Patent Publication Number: US-2023149827-A1

Title: Toy building unit

Description:
BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG.  1 A  illustrates a toy building unit in a flat position, according to some aspects of the disclosure. 
       FIG.  1 B  illustrates a toy building unit partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  1 C  illustrates a toy building unit in a closed position, according to some aspects of the disclosure. 
       FIG.  2 A  illustrates hinge of toy building unit, according to some aspects of the disclosure. 
       FIG.  2 B  illustrates hinge of toy building unit, according to some aspects of the disclosure. 
       FIG.  3 A  illustrates joins of a toy building unit, according to some aspects of the disclosure. 
       FIG.  3 B  illustrates joins of a toy building unit, according to some aspects of the disclosure. 
       FIG.  3 C  illustrates joins of a toy building unit connecting to form a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  4 A  illustrates a toy building unit that is a cuboid in a flat position, according to some aspects of the disclosure. 
       FIG.  4 B  illustrates a toy building unit that is partially constructed as a cuboid in a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  5 A  illustrates a toy building unit that is a square based pyramid in a flat position, according to some aspects of the disclosure. 
       FIG.  5 B  illustrates a toy building unit that is partially constructed as a square based pyramid in a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  6 A  illustrates a toy building unit that is a triangle volume in a flat position, according to some aspects of the disclosure. 
       FIG.  6 B  illustrates a toy building unit that is partially constructed as a triangle volume in a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  7 A  illustrates a toy building unit that is a domed cuboid in a flat position, according to some aspects of the disclosure. 
       FIG.  7 B  illustrates a toy building unit that is partially constructed as a domed cuboid in a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  8 A  illustrates a toy building unit that is a half cylinder in a flat position, according to some aspects of the disclosure. 
       FIG.  8 B  illustrates a toy building unit that is partially constructed as a half cylinder in a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  9 A  illustrates a toy building unit that is a quarter cylinder in a flat position, according to some aspects of the disclosure. 
       FIG.  9 B  illustrates a toy building unit that is partially constructed as a quarter cylinder in a three-dimensional hollow unit, according to some aspects of the disclosure. 
       FIG.  10 A  illustrates interleaving teeth of two joins from the view of an outside surface of the toy building unit in a three-dimensional hollow position, according to some aspects of the disclosure. 
       FIG.  10 B  illustrates a partial front view of joined joins, according to some aspects of the disclosure. 
       FIG.  10 C  illustrates an isometric view of un-joined join with two teeth, according to some aspects of the disclosure. 
       FIG.  10 D  illustrates interleaving teeth of two joins from the view of a top outside surface of the toy building unit in a three-dimensional hollow position, according to some aspects of the disclosure. 
       FIG.  11 A  illustrates interleaving two joins with a plurality of spike teeth from the view of an outside surface of the toy building unit in a three-dimensional hollow position, according to some aspects of the disclosure. 
       FIG.  11 B  illustrates a partial front view of two joined joins with a plurality of spike teeth, according to some aspects of the disclosure. 
       FIG.  11 C  illustrates an isometric view of un-joined join with a plurality of spike teeth, according to some aspects of the disclosure. 
       FIG.  11 D  illustrates two joined joins with a plurality of spike teeth interleaving from the view of a top surface of the toy building unit in a three-dimensional hollow position, according to some aspects of the disclosure. 
       FIG.  11 E  illustrates detailed interleaving of spike teeth, according to some aspects of the disclosure. 
       FIG.  12 A  illustrates two joined ridge joins from the view of an outside surface of the toy building unit in a three-dimensional hollow position, according to some aspects of the disclosure. 
       FIG.  12 B  illustrates a partial front view of two joined ridge joins, according to some aspects of the disclosure. 
       FIG.  12 C  illustrates an isometric view of un-joined ridge join with curved ridge instead of teeth, according to some aspects of the disclosure. 
       FIG.  12 D  illustrates a front view of an un-joined join with curved ridge instead of teeth, according to some aspects of the disclosure. 
       FIG.  12 E  illustrates joined curved ridge joins from a top outside view of the toy building unit in a three-dimensional hollow position, according to some aspects of the disclosure. 
       FIG.  13 A  illustrates a front view of an un-joined join with angled ridge instead of teeth, according to some aspects of the disclosure. 
       FIG.  13 B  illustrates a partial front view of joined joins with angled ridges, according to some aspects of the disclosure. 
       FIG.  13 C  illustrates an isometric view of un-joined join with angled ridge instead of teeth, according to some aspects of the disclosure. 
       FIG.  14 A  illustrates an example method of manufacturing the toy building unit, according to aspects of the disclosure. 
       FIG.  14 B  illustrates an example method of manufacturing the toy building unit, according to aspects of the disclosure. 
    
    
     DETAILED DESCRIPTION 
     Provided herein is a toy building unit for playing capable of folding from a flat position into a three-dimensional hollow position held together only by friction and methods of manufacturing the same. 
     In some embodiments, the building unit  100  can be in a flat position  102 , a partially constructed position, a three-dimensional hollow position  108 , a closed position, or an open position. In some embodiments, the building unit  100  in a closed position can be the building unit in a three-dimensional hollow position  108 . In some embodiments, the building unit  100  in an open position can be the building unit  100  in a partially constructed position such that at least one section  104  has an edge which is a join  110  that is not paired with (e.g., not connected with) another join  110 . In some embodiments, closure of the building unit  100  (e.g., the building unit in a partially constructed position or a three-dimensional hollow position  108 ), can provide structural rigidity. 
     In some embodiments, the building unit  100  can include a plurality of sections  104 . In some embodiments, the building unit  100  can include 3 to tens, or any value or range between, or more sections  104 . In some embodiments, the sections  104  can be, but are not limited to, square, rectangular, semicircular, triangular, oblong, pentagonal, hexagonal, diamond, trapezoidal, octagonal, or any other suitable shape. In some embodiments, the sections  104  can be rigid, flexible, or pliable, or capable of forming an arc. In some embodiments, the plurality of sections  104  can be delineated from and connected to at least one other section  104 . In some embodiments, a section  104  can be connected to another section  104  by at least one hinge  106 . In some embodiments the at least one hinge  106  is integral to the building unit  100 . In some embodiments, integral can mean that the sections and the hinges are one piece a same material. In some embodiments, integral can mean that the building unit  100  can be made such that all of the sections and all of the hinges are made of one material that can start in a flat or two-dimensional position and fold into a three-dimensional hollow position  108 . In some embodiments, integral can mean that hinges  106  can be part of the building unit  100  and can be manufactured in one piece of a same material, as shown in  FIGS.  1 - 2 ,  3 C,  4 - 9   . In some embodiments, a section  104  can have an edge. In some embodiments, the edge of a section  104  can be on an outside perimeter of the toy building unit  100 . In some embodiments, at least one edge of a section  104  can be a join  110 . 
     In some embodiments, the building unit  100  can include a plurality of hinges  106 . In some embodiments, the hinge  106  can be integral to the building unit  100 . In some embodiments, the hinge  110  can be a living hinge. In some embodiments, the hinge  110  can be a partial cut. In some embodiments, the hinge  110  can be a small indent at a stress point aligned collinearly on the building unit  100  rather than cutting the thickness of the building unit  100  entirely. In some embodiments, the hinge can appear as a groove viewing one surface of the building unit  100  and a ridge when viewing the opposite surface of the building unit  100 . In some embodiments, a hinge  106  can connect two sections  104  of the building unit  100 . In some embodiments, the hinge  106  can bend to an angle when the building unit is in a three-dimensional hollow position  108 . In some embodiments, the angle of the hinge  106  when the building unit is in a closed position  108  can be about a 15° angle to about a 200° angle or any range or value between. In some embodiments, one or more hinge  106  can be removed. In some embodiments, one or more hinge  106  can be removably attached. In some embodiments, one or more hinge of the building unit  100  can be replaced by two joins  110 . 
     In some embodiments, the building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can be a zip join, a finger join, or any other suitable join. In some embodiment, a join can include one or more teeth. In some embodiments, the joins  110  may be along the perimeter of the building unit  100 . In some embodiments, the edges of a section  104  of a building unit  100  can include one or more joins  110  corresponding to one or more edges of the section. In some embodiments two joins  110  may be interleaved. In some embodiments, two joins  110  interleaved can hold together two or more sections  104  of the building unit  100 . In some embodiments, two or more joins  110  can be reversibly opened and closed. In some embodiments, joins  110  enable closure of building unit in a three-dimensional hollow position  108 . In some embodiments, joins  110  enable partial closure of building unit  100 . In some embodiments, two or more joins  110  can be held together by friction. In some embodiments, closure of building unit  100  is enabled by friction among joins  110 . In some embodiments, closure of building unit  100  is reversable and repeatable. In some embodiments, joins  110  have no teeth  112 , but latching ridge or similar mechanism among joins  110  connect two or more sections  104  of the building unit  100  into a closed position. In some embodiments, joins have one or more teeth  112 . 
     In some embodiments, hinges  106  and joins  110  are features of the building unit  100  when the building unit in a flat position  102  and the building unit in a three-dimensional hollow position  108 . 
     In some embodiments, the building unit  100  can include one or more teeth  112 . In some embodiments, the building unit  100  can include one or more teeth at each join  110  outlining the outer edges of sections  104  of the building unit. In some embodiments, join  110  can include the one or more teeth  112 . In some embodiments, teeth  112  can be integral to joins  110  and grip one or more opposing teeth  112  (e.g., teeth integral to another join  110  on another different section  104  such that the two joins are paired to form an edge of the building unit in a three-dimensional hollow position  108 ). In some embodiments a join  110  can include about 0 teeth  112  to about 100 teeth  112  or any range or value between. In some embodiments the teeth  112  can be curved, angled, and/or straight. In some embodiments, teeth  112  can include ridges, grooves, spikes, protrusions, cavities, or other suitable shapes to enable paired joins to remain paired when the building unit is in a three-dimensional hollow position  108 . In some embodiments, teeth  112  can have a thickness, a depth, and a width. In some embodiments, two teeth  112  can be about 15 mm wide, about 3 mm thickness, and about 3 mm depth. In some embodiments, three teeth can be about 5 mm wide, about 3 mm thick, and about 3 mm depth. In some embodiments, teeth have various widths and/or dimensions. In some embodiments, teeth  112  can be, for example, a quarter inch wide and a quarter inch tall/deep. In some embodiments, teeth  112  can be uniform or of different widths and depths. In some embodiments, teeth  112  can be rectangular. In some embodiments, teeth  112  can be rectangular rounded. In some embodiments, teeth  112  can be waves. In some embodiments, teeth  112  can be spikes. In some embodiments, teeth  112  can be protrusions. In some embodiments, teeth  112  can be latches. In some embodiments, joins  110  can comprise one or more angle-edge teeth  112 , which function as a finger pull for ease of opening. In some embodiments the teeth  112  of the join  110  are rounded on two axes for smooth interleaving and reduced friction. In some embodiments the teeth  112  of the join  110  are rounded on one axis, which creates more friction than when teeth  112  are rounded on two axes. In some embodiments, there is friction where the teeth  112  of two joins  110  come together, with the inner teeth  112  along the join edge providing more friction. 
     In some embodiments, the thickness of joins  110  and depth of the teeth  112  can vary for each material of the building unit  100 . In some embodiments the joins  110  can be about 0.2 mm to tens mm thick, or any range or value between. In some embodiments, teeth  112  can be the same thickness as the joins  110 . In some embodiments, width of teeth  112  can range from about 0.2 mm to tens mm wide, or any range or value between. In some embodiments, teeth  112  can be about 0.2 mm to tens mm deep, or any range or value between. In some embodiments, the thickness of one or more of the teeth  112  of a join  110  on one section  104  can be about the depth of one or more of the teeth  112  of another join  110  on another section. In some embodiments, the depth and thickness of the teeth can vary relative to the thickness of the material (e.g., sheeting or molded material) of the toy building unit  100 , whereas the width of the teeth  112  can be a fraction of the entire length of an edge of a section. In some embodiments, the minimum and/or maximum thickness of joins  110  and/or teeth  112 , depth of teeth  112 , and width of teeth  112  can vary for each material. In some embodiments, the minimum and/or maximum thickness of joins and depth of teeth varies for each material of the building unit  100  such that the dimensions allow the building unit in a three-dimensional hollow position  108  to close properly and reversibly open. 
     In some embodiments, the building unit  100  can include one or more edges. In some embodiments, the edges can be the edges of the sections  104 . In some embodiments, the edges of the sections  104  of the building unit  100  can be a join  110 . In some embodiments, the edges of the section  104  are un-joined joins  110 . In some embodiments, the edges of the building unit  100  are un-joined joins  110 . In some embodiments, the edges can be the edges of the three-dimensional hollow building unit  114 . In some embodiments, the edges of the three-dimensional hollow building unit  114  can be a hinge  106  that connects two sections  104  of the building unit. In some embodiments, the edges of the three-dimensional hollow building unit  114  can be two joins  110  that come together (e.g., interleaved, paired, clicked in place, removably attached, held together by friction, and the like) to form an edge of the three-dimensional hollow building unit  114 . 
     In some embodiments, the closed joins  110  can create the building unit in a three-dimensional hollow position  108 . In some embodiments, the closed joins  110  connect the sections  104  of the building unit  100  to each other predominantly by static friction so that the resulting polyhedron remains closed during play. In other words, in some embodiments, the building unit in a three-dimensional hollow position  108  remains closed by the static friction force in the closed joins  110  and thus there is no need for glue, tucking, magnets, or any other means. In some embodiments, the closed joins  110  may be pulled open by an intentional manual force to return the building unit  100  unit to a flat position  102 . In some embodiments, the transition between the building unit  100  in a flat position  102  with open joins to the building unit in a three-dimensional hollow position  108  with closed joins  110  is reversible and repeatable. In some embodiments, the transition between the building unit  100  in a flat position  102  with open joins to the building unit in a three-dimensional hollow position  108  with closed joins is not reversible and repeatable. In some embodiments, the transition between the building unit  100  in a flat position  102  with open joins to the building unit in a three-dimensional hollow position  108  with closed joins  110  is partially reversible and repeatable such that some sections  104  feature joins  110  that can be opened and closed in a reversable and repeatable manner, while other sections  104  feature joins  110  that cannot be opened and closed in a reversable and repeatable manner. 
     Shapes 
     In some embodiments, the building unit  100  can fold from a flat position  102  into a three-dimensional hollow position  108 . In some embodiments, the building unit in a flat position  102  can be described using the mathematical concept of a two-dimensional (2D) net. In some embodiments, the building unit in a flat position  102  can be described as a net, a 2D net, a net of a solid, a net of a polyhedron, a cut-out, a stencil, a paper sheet, or the like. A net is an arrangement of non-overlapping edge-joined polygons in the plane which can be folded (along edges) to become the faces of the polyhedron. Many different nets can exist for a given polyhedron, depending on the choices of which edges are joined and which are separated. Nets are known. For example, there are eleven nets of a cube, wherein each net is a unique arrangement of sections  104  of the net. 
     In some embodiments, the building unit  100  can be a cuboid, square based pyramid, triangle volume, domed cuboid, half cylinder, quarter cylinder, or any other three-dimensional shape (e.g., any polyhedron). In some embodiments, a three-dimensional hollow position  108  of the building unit  100  can be a cuboid, square based pyramid, triangle volume, domed cuboid, half cylinder, quarter cylinder, or any other three-dimensional shape (e.g., any polyhedron). 
     In some embodiments, the building unit  100  can be a cuboid. In some embodiments, the cuboid can be a cube where the ratio of width:length:height is equal. For example, in some embodiments that cuboid can be about 10 to about 1000 mm in width, length, and height. In some embodiments a cuboid can be an extended cube where one dimension of the width:length:height ratio is extended. In some embodiments, a cuboid can be a rectangular prism where one or more dimension of the width:length:height ratio is extended. In some embodiments, the cuboid unit can include five hinges  106  and fourteen joins  110 . In some embodiments, the building unit  100  of the cuboid unit can include six sections  104 . In some embodiments, the fourteen joins  110 , when closed, form eight edges of the cuboid (e.g., edge of the three-dimensional hollow building unit  114 ) and the five hinges  106  form five edges of the cuboid (e.g., edge of the three-dimensional hollow building unit  114 ). In some embodiments, the width of the cuboid can be about 10 mm to about 1000 mm. In some embodiments, the length of the cuboid can be about 10 mm to about 1000 mm. In some embodiments, the height of the cuboid can be about 10 mm to about 1000 mm. 
     In some embodiments, the building unit  100  can be a square based pyramid. In some embodiments, the square based pyramid can include four hinges  106  and eight joins  110 . In some embodiments, the building unit  100  of the square based pyramid can include five sections  104 . In some embodiments, the eight joins  110 , when closed, form four edges of the square based pyramid (e.g., edge of the three-dimensional hollow building unit  114 ), and the four hinges  106  form four edges of the square based pyramid (e.g., edge of the three-dimensional hollow building unit  114 ). In some embodiments, the base of the square based pyramid can be about 10 mm to about 1000 mm by about 10 to about 1000 mm. In some embodiments, the height of the square based pyramid can be about 10 mm to about 1000 mm at the tallest point. 
     In some embodiments, the building unit  100  can be a triangle volume. In some embodiments, the triangle volume can include four hinges  106  and ten joins  110 . In some embodiments, the building unit  100  of the triangle volume can include five sections  104 . In some embodiments, the ten joins  110 , when closed, form five edges of the triangle volume (e.g., edge of the three-dimensional hollow building unit  114 ), and the four hinges  106  form four edges of the triangle volume (e.g., edge of the three-dimensional hollow building unit  114 ). In some embodiments, the width of the triangle volume can be about 10 mm to about 1000 mm. In some embodiments, the length of the triangle volume can be about 10 mm to about 1000 mm. In some embodiments, the height of the triangle volume can be about 10 mm to about 1200 mm at the tallest point. 
     In some embodiments, the building unit in a three-dimensional hollow position  108  can include a volume with a cylindrically curved surface, with one section that curves into a three-dimensional position by flexing the material of the building unit  100  to connect to an adjoining section  104  on which the join  110  is curved. The flexibility of the curved section  104  can be enabled by the use of a flexible material to make the building unit  100 , or by adding features such as ribbing or cuts into a rigid material. 
     In some embodiments, the building unit  100  can be a domed cuboid. In some embodiments, the domed cuboid can include five hinges  106  and fourteen joins  110 . In some embodiments, the building unit  100  of the domed cuboid can include six sections  104 . In some embodiments, the fourteen joins  110 , when closed, form seven edges of the domed cuboid (e.g., edge of the three-dimensional hollow building unit  114 ), and the five hinges  106  form five edges of the domed cuboid (e.g., edge of the three-dimensional hollow building unit  114 ). In some embodiments, the width of the domed cuboid can be about 10 mm to about 1000 mm. In some embodiments, the length of the domed cuboid can be about 10 mm to about 1000 mm. In some embodiments, the height of the domed cuboid can be about 10 mm to about 1200 mm at the tallest point. 
     In some embodiments, the building unit  100  can be a half cylinder. In some embodiments, the half cylinder can include three hinges  106  and six joins  110 . In some embodiments, the building unit  100  of the half cylinder can include four sections  104 . In some embodiments, the six joins  110 , when closed, form three edges of the half cylinder (e.g., edge of the three-dimensional hollow building unit  114 ), and the three hinges  106  form three edges of the half cylinder (e.g., edge of the three-dimensional hollow building unit  114 ). In some embodiments, the width of the half cylinder can be about 10 mm to about 1000 mm. In some embodiments, the length of the half cylinder can be about 10 mm to about 1000 mm. In some embodiments, the height of the half cylinder can be about 10 mm to about 1200 mm at the tallest point. 
     In some embodiments, the building unit  100  can be a quarter cylinder. In some embodiments, the quarter cylinder can include four hinges  106  and ten joins  110 . In some embodiments, the building unit  100  of the quarter cylinder can include five sections  104 . In some embodiments, the ten joins  110 , when closed, form five edges of the quarter cylinder (e.g., edge of the three-dimensional hollow building unit  114 ), and the four hinges  106  form four edges of the quarter cylinder (e.g., edge of the three-dimensional hollow building unit  114 ). In some embodiments, the width of the quarter cylinder can be about 10 mm to about 1000 mm. In some embodiments, the length of the quarter cylinder can be about 10 mm to about 1000 mm. In some embodiments, the height of the quarter cylinder can be about 10 mm to about 1000 mm. 
     In some embodiments, any shape or configuration could be used. 
     Materials 
     In some embodiments, the toy building unit  100  can be made of a material suitable for method of manufacturing a toy building unit  100  that is capable of folding from a flat position  102  into a three-dimensional hollow position  108  wherein the building unit  100  can include a plurality of sections  104 , wherein the plurality of sections  104  can be delineated from and connected to at least one other section  104  with a hinge  106  that is integral to the building unit, a plurality of joins  110  (which are the outer edges of the building unit) outlining the building unit  100 , wherein the joins  110  can connect the sections  104  of the building unit  100  forming edges of the closed three-dimensional hollow building unit  108 . 
     In some embodiments, the building unit  100  can be made of a material. In some embodiments, the material can be cardstock, cardboard, bagasse, wood, wood sheeting, particle board, laminate, plastic, plastic sheeting, vellum, vellum paper, rubber, foam sheeting, vinyl sheeting, rubber sheeting, plasticized pulp, pulp, recycled pulp, or any combination thereof. In some embodiments, a pulp can be, for example, paper pulp, bagasse pulp, hemp pulp, bamboo pulp, wood pulp, or any combination thereof. In some embodiments, the building unit  100  can be made of a material that further includes a resin. In some embodiments, a resin can be, for example, polyester resin, phenolic resin, alkyd resin, polycarbonate resin, polyamide resin, polyurethane resin, silicone resin, epoxy resin, UV resin, or combinations thereof. In some embodiments, the building unit  100  can be made of a material that includes coatings. In some embodiments, coatings can include wax, plastic, bioplastic, or combinations thereof. In some embodiments, the building material  100  can be made of a material that includes one or more additives. In some embodiments, the building unit  100  can include a laminate of one or more material. In some embodiments, a laminate can be two or more layers of different materials, often with a plastic being the outer layer, e.g., laminated paper can be a plastic layer bonded to a paper layer, and laminated wood is generally a plastic layer bonded to a wood layer (could be three layers chip board, wood veneer, then plastic). In some embodiments, one or more additives can include resin, coatings, colorants, stabilizers, a laminate, and the like. 
     Manufacturing 
     Provided herein in some embodiments are methods of manufacturing the toy building unit  100  disclosed herein. 
     In some embodiments, the toy building unit  100  can be manufactured from a single sheet of material. In some embodiments, the method can include cutting a building unit  100  from a single sheeting material; forming a plurality of hinges  106 ; and forming from the edge of a segment of the building unit, a plurality of joins. In some embodiments, the cutting process can be die cutting, laser-cutting, or combinations thereof (see e.g., https://www.iqsdirectory.com/articles/die-cutting.html#capabilities-of-a-die-cutting-machine; https://en.wikipedia.org/wiki/Die_cutting_(web); and https://en.wikipedia.org/wiki/Laser_cutting). In some embodiments, the hinges  106  can be formed by crease scoring the material (see e.g., https://www.iqsdirectory.com/articles/die-cutting.html#capabilities-of-a-die-cutting-machine). In some embodiments, the hinges  106  can be formed by cut scoring the material (see e.g., https://www.iqsdirectory.com/articles/die-cutting.html#capabilities-of-a-die-cutting-machine). In some embodiments, the building unit  100  manufactured by die cutting, laser-cutting, crease scoring, cut scoring, and combinations thereof can be made of cardstock, plastic sheeting, wood sheeting, bagasse sheeting, foam sheeting, particle board, vellum paper, cardboard, paper, vinyl sheeting, rubber sheeting and laminates of any of these materials. In some embodiments, the method can include cutting a plurality of teeth  112  from the edge of a section  104  of the building unit  100 . In some embodiments, the method can include a straight edge. In some embodiments, the straight edge can crease score or cut score the building unit  100  to form the hinges  106 . In some embodiments, the method can be digital. 
     In some embodiments, the method of manufacturing a toy building unit  100  can include forming, by a molding process of a material, a building unit that can include a plurality of sections  104 , wherein the plurality of sections  104  can be delineated from and connected to at least one other section with a hinge that is integral to the building unit  100 ; and a plurality of joins  110  along the outer edges of the building unit  100 . In some embodiments, the joins  110  can comprise one or more, or a plurality of teeth  112 . In some embodiments, the molding process of the material can include injection molding (see e.g., https://en.wikipedia.org/wiki/Injection moulding). Suitable materials for injection molding can include plastic, bioplastic, rubber, or combinations thereof. 
     In some embodiments, the molding process of material can include wet pressing, dry pressing, transfer molding, thermoforming, or combinations thereof (see e.g., https://en.wikipedia.org/wiki/Molded_pulp; https://www.goldenarrow.com/blog/what-molded-fiber-pulp; Moulded Pulp Manufacturing: Overview and Prospects for the Process Technology Article in Packaging Technology and Science February 2017. https://www.researchgate.net/publication/314131029_Moulded_Pulp_Manufacturing_Overview_and_Prospects_for_the_Process_Technology). Suitable materials for wet pressing, dry pressing, transfer molding, thermoforming, or combinations thereof can include paper pulp, bagasse pulp, hemp pulp, bamboo pulp, wood pulp, recycled pulp, or combinations thereof. Suitable materials for wet pressing, dry pressing, transfer molding, thermoforming, or combinations thereof can further include resins, wax, plastic, bioplastic, or combinations thereof. 
     In some embodiments the method can include a waterproofing step. 
     In some embodiments the method can be three-dimensional printing. 
     EXAMPLES 
     The figures provided herein illustrate the toy building unit  100  and features thereof according to some embodiments of the present disclosure. The figures show combination with hinges  106  and joins  110 , but any combination of joins  110  and hinges  106  can be used. For example, in some non-limiting embodiments, the building unit  100  can include only joins  110  between sections  104 . 
       FIG.  1    illustrates a cuboid toy building unit  100  in the flat position  102 , partially constructed position, in the three-dimensional hollow building unit  108 , according to some embodiments of the present disclosure.  FIG.  1 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include five hinges  106 , as illustrated in  FIG.  1   . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include six sections  104  as shown in  FIG.  1   . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include fourteen joins  110  as shown in  FIG.  1   . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  1   .  FIG.  1 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  1 B-C .  FIG.  1 C  illustrates a toy building unit in a closed position, according to some aspects of the disclosure. 
       FIG.  2    illustrates hinge  106  of the toy building unit  100 . In some embodiments, the hinge  106  can be recessed such that a 45° angle can be formed when the building unit is in a flat position  102  as shown in  FIG.  2 A . In some embodiments, the hinge  106  can form a 90° angle when the building unit  100  is in a partially constructed position or in a three-dimensional hollow position  108  as shown in  FIG.  2 A . In some embodiments, the hinge  106  can be recessed such that a 22.5° angle can be formed when the building unit is in a flat position  102  as shown in  FIG.  2 B . In some embodiments, the hinge  106  can form a 45° angle when the building unit  100  is in a partially constructed position or in a three-dimensional hollow position  108  as shown in  FIG.  2 B . In some embodiments, the hinge  106  can form an angle that can be about a 15° angle up to a 150° angle or any range or value between when the building unit  100  is partially constructed position or in a three-dimensional hollow position  108 . 
       FIG.  3    illustrates various join  110  designs on the toy building unit  100  according to some embodiments.  FIG.  3 A  illustrates a close-up view of die-cut join teeth with 1.5 mm thick side walls which may be implemented in plastic sheeting, cardstock, wood, laminate, for example. In some embodiments, the toy building unit  100  can include one or more sections  104  with one or more joins  110 , which can include one or more teeth  112  as shown in  FIG.  3 A . In some embodiments, the join  110  can have four or five teeth  112  as shown in  FIG.  3 A . In some embodiments, the teeth  112  can be cut perpendicular to the surface  104  as shown in  FIG.  3 A .  FIG.  3 B  illustrates a close-up view of an injection molded implementations with teeth  112  of lower granularity, 3 mm thick side walls which may be implemented in molded plastic, molded bagasse pulp, molded rubber, for example.  FIG.  3 A  also illustrates an angled-edge teeth  112  design that functions as a finger pull for ease of opening, according to some embodiments.  FIG.  3 B  illustrates rounded edges along two directions of the teeth  112  to enable smooth interleaving and reduce friction. In some embodiments, rounded edges can be along one edge of the teeth  112  (not shown) to decrease friction over the embodiment depicted in  FIG.  3 B . In some embodiments, the toy building unit  100  can include one or more sections  104  with one or more joins  110 , which can include one or more teeth  112  as shown in  FIG.  3 B . In some embodiments, the join  110  can have two or three teeth  112  as shown in  FIG.  3 B . In some embodiments, the teeth  112  can be molded as shown in  FIG.  3 B . 
       FIG.  3 C  illustrates joins  112  of a toy building unit connecting to form a three-dimensional hollow unit  108 , according to some aspects of the disclosure.  FIG.  3 C  shows a view of the building unit in three-dimensional hollow position  108 , the building unit  100  has one or more hinges  106 , one or more sections  104 , one or more joins  110 , one or more teeth  112 , and one or more edges of the three-dimensional hollow building unit  114 . In some embodiments, two or more sections  104  of the building unit  100  can connect. In some embodiments, the edge of the three-dimensional hollow building unit  114  can be connected by joins as shown by Edge(AB)  114  in  FIG.  3 C . In some embodiments, the edge of the three-dimensional hollow building unit  108  can be a hinge  106  between two sections  104 . In some embodiments, Edge(AB)  114  can connect two sections  104 . One section can be, for example, Section A  104  and another section can be, for example, Section B  104 , as shown in  FIG.  3 C . In some embodiments, Edge(AB)  114  can connect Section A  104  and Section B  104 , as shown in  FIG.  3 C . In some embodiments, an edge of the three-dimensional hollow building unit  114  can be formed by the pairing of two joins  110 . In some embodiments, the edge of the three-dimensional hollow building unit  114  can be Edge(AB). In some embodiments, the two joins  110  can be Join A  110  and Join B  110 , as shown in  FIG.  3 C . In some embodiments, Edge(AB)  114  can be formed by the pairing of Join A  110  and Join B  110 , as shown in  FIG.  3 C . In some embodiments, the width of the teeth  112  of one join  110  can be longer than the width of the teeth  112  of another join  110 . In some embodiments, the thickness of the teeth  112  of one join  110  can be equal and/or about equal to the depth of the teeth  112  of another join  110 . In some embodiments, the width of the teeth  112  in Join A  110  can be longer than the width of the teeth in Join B  110 , and the thickness of the teeth  112  in Join A can be equal and/or about equal to the depth of the teeth  112  in Join B  110 , as shown in  FIG.  3 C . In some embodiments, two teeth  112  on section A  104  can be about 15 mm wide, about 3 mm thickness, and about 3 mm depth. In some embodiments, three teeth  112  on section B  104  can be about 5 mm wide, about 3 mm thick, and about 3 mm depth. In some embodiments, teeth have various widths and/or dimensions. 
       FIG.  4    illustrates a cuboid toy building unit  100  in the flat position  102  and in a partially constructed position, according to some embodiments of the present disclosure.  FIG.  4 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include five hinges  106 , as illustrated in dotted lines in  FIG.  4   . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include six sections  104  as shown in  FIG.  4   . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include fourteen joins  110  as shown in  FIG.  4   . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  4   .  FIG.  4 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  4 B . 
       FIG.  5    illustrates a square based pyramid building unit  100  in the flat position  102  and in a partially constructed position, according to some embodiments of the present disclosure.  FIG.  5 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include four hinges  106 , as illustrated by dotted lines in  FIG.  5   . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include five sections  104  as shown in  FIG.  5   . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include eight joins  110  as shown in  FIG.  5 A . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  5   .  FIG.  5 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  5 B . 
       FIG.  6    illustrates a triangle volume building unit  100  in the flat position  102  and in a partially constructed position, according to some embodiments of the present disclosure.  FIG.  6 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include four hinges  106 , as illustrated by dotted lines in  FIG.  6   . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include five sections  104  as shown in  FIG.  6 A . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include ten joins  110  as shown in  FIG.  6 A . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  6   .  FIG.  6 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  6 B . 
       FIG.  7    illustrates a domed cuboid building unit  100  in the flat position  102  and in a partially constructed position, according to some embodiments of the present disclosure.  FIG.  7 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include five hinges  106 , as illustrated by dotted lines in  FIG.  7 A . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include six sections  104  as shown in  FIG.  7 A . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include fourteen joins  110  as shown in  FIG.  7 A . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  7   .  FIG.  7 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  7 B . 
       FIG.  8    illustrates a half cylinder building unit  100  in the flat position  102  and in a partially constructed position, according to some embodiments of the present disclosure.  FIG.  8 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include three hinges  106 , as illustrated by dotted lines in  FIG.  8 A . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include four sections  104  as shown in  FIG.  8 A . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include six joins  110  as shown in  FIG.  8 A . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  8   .  FIG.  8 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  8 B . 
       FIG.  9    illustrates a quarter cylinder building unit  100  in the flat position  102  and in a partially constructed position, according to some embodiments of the present disclosure.  FIG.  9 A  illustrates a toy building unit in a flat position  102 , according to some aspects of the disclosure. In some embodiments, the toy building unit  100  can include four hinges  106 , as illustrated by dotted lines in  FIG.  9 A . In some embodiments, the toy building unit  100  can include no hinges  106 . In some embodiments the toy building unit  100  can include a plurality of hinges  106 . In some embodiments, the toy building unit  100  can include five sections  104  as shown in  FIG.  9 A . In some embodiments, the toy building unit  100  can include a plurality of sections  104 . In some embodiments, the toy building unit  100  can include ten joins  110  as shown in  FIG.  9 A . In some embodiments, the joins can outline the sections  104  of the building unit in a flat position  102 . In some embodiments, the toy building unit  100  can include a plurality of joins  110 . In some embodiments, the join  110  can include teeth  112  as shown in  FIG.  9   .  FIG.  9 B  illustrates a toy building unit  100  partially folded into a three-dimensional hollow unit, according to some aspects of the disclosure. In some embodiments, joins  110  of the building unit  100  can come together (e.g., interleave) and form an edge of the three-dimensional hollow building unit  114  as shown in  FIG.  9 B . 
       FIG.  10    illustrates example joins  110 , for which the static friction can hold the building unit  100  together in a three-dimensional hollow position  108 , according to some embodiments.  FIG.  10 A  illustrates interleaving teeth  112  of two joins  110  from the view of an outside surface of the toy building  100  unit in a three-dimensional hollow position  108 , according to some aspects of the disclosure.  FIG.  10 B  illustrates a partial front view of joined joins  110 , according to some aspects of the disclosure. In some embodiments, joins  110  can meet at right angles (90° angle), as shown in  FIG.  10 A-B  and  FIG.  10 C . In some embodiments, the joins can meet at angles other than 90° angle. In some embodiments, joins can meet at about a 15° angle up to a 150° angle or any range or value between.  FIG.  10 C  illustrates an isometric view of un-joined join  110  with two teeth  112 , according to some aspects of the disclosure.  FIG.  10 D  illustrates interleaving teeth  112  of two joins  110  from the view of a top outside surface of the toy building unit in a three-dimensional hollow position  108 , according to some aspects of the disclosure. In some embodiments, interleaving teeth may enable friction to retain joins  110  such that the building unit  100  remains in a closed position, as shown partially in  FIG.  10 A  and  FIG.  10 D . In some embodiments, the toy building unit  100  shown in  FIG.  10    can be manufactured using cutting or molding processes described herein and known in the art. 
       FIG.  11    illustrates example views of the toy building unit  100  with joins  110  that include a plurality of spike teeth  112  according to some embodiments of the present disclosure.  FIG.  11 A  illustrates interleaving two joins  110  with a plurality of spike teeth  112  from the view of an outside surface of the toy building unit in a three-dimensional hollow position  108 , according to some aspects of the disclosure.  FIG.  11 B  illustrates a partial front view of two joined joins  110  with a plurality of spike teeth  112 , according to some aspects of the disclosure. In some embodiments, interleaving teeth  112  are not visible from the view of the outside surface of the toy building unit in a three-dimensional hollow position  108 , as shown in  FIG.  11 A . In some embodiments, the teeth  112  of two joins  110  of the building unit  100  can come together at multiple points, such that the interleaving teeth  112  are visible from a front view of interleaving joins  110 , as illustrated in  FIG.  11 B .  FIG.  11 C  illustrates an isometric view of un-joined join  110  with a plurality of spike teeth  112 , according to some aspects of the disclosure. In some embodiments, the teeth  112  of the join  110  of the building unit  100  can be spikes, protrusions, jagged edges, barbs, catches, and the like (as shown in  FIG.  11 C  and  FIG.  11 E ), which can enable friction to retain joins  110  in a closed position. In some embodiments, styles of teeth  112  that include spikes, protrusions, jagged edges, barbs, catches, and the like can be manufactured using molding processes described herein and known in the art.  FIG.  11 D  illustrates two joined joins  110  with a plurality of spike teeth interleaving from the view of a top surface of the toy building unit in a three-dimensional hollow position  108 , according to some aspects of the disclosure. In some embodiments, interleaving teeth  112  are not visible from the top view of the toy building unit in a three-dimensional hollow position  108 , as shown in  FIG.  11 D .  FIG.  11 E  illustrates detailed interleaving of spike teeth  112 , according to some aspects of the disclosure. Three interleaving spike designs are shown in cutout according to some non-limiting examples ( FIG.  11 E ). In some embodiments, the teeth  112  may enable friction to retain joins  110  such that the building unit  100  remains in a closed position, as shown partially in  FIG.  11 A-B  and  FIG.  11 D-E . In some embodiments, the toy building unit  100  shown in  FIG.  11    can be manufactured using molding processes described herein and known in the art. 
       FIG.  12    illustrates a join with a curved ridge, which may enable joins  110  to be retained in a closed position by friction, by latching of overlapped ridges, or by a combination of friction and latching of overlapped ridges, according to some embodiments. In some embodiments, the join  110  of the building unit  100  can include an integral interleaving mechanism and no teeth  112 , as shown in  FIG.  12   . In some embodiments, the join  110  of the building unit  100  can include an integral interleaving mechanism and teeth  112  (not shown). In some embodiments, an integral interleaving mechanism of a join  110  can include a ridge, as shown in  FIG.  12   . In some embodiments, the ridge can be curved as shown in  FIG.  12   .  FIG.  12 A  illustrates two joined ridge joins  110  from the view of an outside surface of the toy building unit in a three-dimensional hollow position  108 , according to some aspects of the disclosure. In some embodiments, interleaving joins  110  are not visible from the view of the outside surface of the toy building unit in a three-dimensional hollow position  108 , as shown in  FIG.  12 A .  FIG.  12 B  illustrates a partial front view of two joined ridge joins  110 , according to some aspects of the disclosure. In some embodiments, the joins  110  with an integral interleaving mechanism can enable latching of opposing ridges which may retain joins in a closed position, as shown in  FIG.  12 B .  FIG.  12 C  illustrates an isometric view of un-joined ridge join  110  with curved ridge instead of teeth  112 , according to some aspects of the disclosure. In some embodiments, the curved ridge can be the integral interleaving mechanism. In some embodiments, the integral interleaving mechanism can include a first lip  116  and a second lip  118 . In some embodiments, the space between the first lip  116  and the second lip  118  can be curved, as shown in  FIG.  12 C .  FIG.  12 D  illustrates a front view of an un-joined join  110  with curved ridge instead of teeth  112 , according to some aspects of the disclosure. In some embodiments, the curved ridge can be the integral interleaving mechanism. In some embodiments, the integral interleaving mechanism can include a first lip  116  and a second lip  118 . In some embodiments, the first lip  116  can be slightly obscured when looking at the section  104  from a front view, as shown in  FIG.  12 D . In some embodiments, the second lip can be viewed when looking at the section  104  from a front view, as shown in  FIG.  12 D .  FIG.  12 E  illustrates joined curved ridge joins  110  from a top outside view of the toy building unit in a three-dimensional hollow position  108 , according to some aspects of the disclosure. In some embodiments, interleaving joins  110  are not visible from the top view of the toy building unit in a three-dimensional hollow position  108 , as shown in  FIG.  12 E . In some embodiments, the toy building unit  100  shown in  FIG.  12    can be manufactured using molding processes described herein and known in the art. 
       FIG.  13    illustrates a join with an angled ridge, which may enable latching ridges to retain joins  110  in a closed position according to some embodiments. In some embodiments, the join  110  of the building unit  100  can include an integral interleaving mechanism and no teeth  112 , as shown in  FIG.  13   . In some embodiments, the join  110  of the building unit  100  can include an integral interleaving mechanism and teeth  112  (not shown). In some embodiments, an integral interleaving mechanism of a join  110  can include a ridge, as shown in  FIG.  13   .  FIG.  13 A  illustrates a front view of an un-joined join  110  with angled ridge joins instead of teeth, according to some aspects of the disclosure. In some embodiments, the ridge can be angled as shown in  FIG.  13   . In some embodiments, the angled ridge can be the integral interleaving mechanism. In some embodiments, the integral interleaving mechanism can include a first lip  116  and a second lip  118 . In some embodiments, the first lip  116  can be viewed when looking at the section  104  from a front view, as shown in  FIG.  13 A . In some embodiments, the second lip can be viewed when looking at the section  104  from a front view, as shown in  FIG.  13 A .  FIG.  13 B  illustrates a partial front view of joined joins  110  with angled ridges, according to some aspects of the disclosure. In some embodiments, the joins  110  with an integral interleaving mechanism can enable latching of ridges which may retain joins in a closed position, as shown in  FIG.  13 B .  FIG.  13 C  illustrates an isometric view of un-joined join  110  with angled ridge instead of teeth  112 , according to some aspects of the disclosure. In some embodiments, the angled ridge can be the integral interleaving mechanism. In some embodiments, the integral interleaving mechanism can include a first lip  116  and a second lip  118 . In some embodiments, the space between the first lip  116  and the second lip  118  can be angled, as shown in  FIG.  13 C . In some embodiments, the toy building unit  100  shown in  FIG.  13    can be manufactured using molding processes described herein and known in the art. 
       FIG.  14 A  illustrates an example method of manufacturing the toy building unit, according to aspects of the disclosure. 
       FIG.  14 B  illustrates an example method of manufacturing the toy building unit, according to aspects of the disclosure. 
     Additional Embodiments 
     An embodiment provides a toy building set that can include a building unit which is capable of folding from a flat position into a three-dimensional hollow position; the building unit can include a plurality of sections, wherein the plurality of sections can be delineated from and connected to at least one other section with a hinge that is integral to the building unit; a plurality of joins (which can be the outer edges of the building unit) outlining the building unit, wherein the joins can connect the sections of the building unit forming edges of the closed three-dimensional hollow building unit; and a closed position. 
     In some embodiments, the building unit can be cardboard. In some embodiments, the building unit can be bagasse. In some embodiments, the building unit can be wood. In some embodiments, the building unit can be laminate. In some embodiments, the building unit can be vellum. In some embodiments, the building unit can be rubber. In some embodiments, the building unit can be plasticized pulp. In some embodiments, the building unit can be a domed cuboid unit. In some embodiments, the domed cuboid unit can include five hinge and fourteen joins. In some embodiments, the fourteen joins, when closed, can form seven edges of the domed cuboid unit; and the five hinges can form five edges of the domed cuboid unit. In some embodiments, the building unit can be a half cylinder. In some embodiments, the half cylinder can include three hinge and six joins. In some embodiments, the six joins, when closed, can form three edges of the half cylinder; and the three hinges can form three edges of the half cylinder. In some embodiments, the building unit can be a quarter cylinder. In some embodiments, the quarter cylinder can include four hinge and ten joins. In some embodiments, the ten joins, when closed, can form five edges of the quarter cylinder; and the four hinges can form four edges of the quarter cylinder. In some embodiments, the closed position can include a flat surface created by a final closure. In some embodiments, the building unit can be laminated. 
     Another embodiment provides a method of manufacturing a toy building set, the method can include:
         cutting a building unit from a single sheeting material;   forming, by a straight edge, a plurality of hinges whereby pressing the straight edge into the sheeting material forms the hinges; and   forming, by cutting a plurality of joins.       

     In some embodiments, the building unit can be capable of folding from a flat position into a three-dimensional hollow position with the friction of connected joins. In some embodiments, the straight edge can crease score or cut score, the building unit to form the hinges. In some embodiments, the plurality of hinges can appear as a groove on one side of the building unit and a ridge on the opposite side of the building unit. In some embodiments, cutting can be die cutting, blade cutting, laser cutting, or combinations thereof. In some embodiments, the sheeting material can be cardstock, cardboard, plastic sheeting, bagasse sheeting, wood sheeting, pulp sheeting, plasticized pulp sheeting, laminates, and combinations thereof. 
     Another embodiment provides a method of manufacturing a toy building set, the method can include:
         forming, by a molding process of a material, a building unit comprising:   a plurality of sections, wherein the plurality of sections are delineated from and connected to at least one other section with a hinge that is integral to the building unit; and   a plurality of joins along the outer edges of the building unit, wherein each join comprises a plurality of teeth.       

     In some embodiments, the building unit can be capable of folding from a flat position into a three-dimensional hollow position with the friction of connected joins. In some embodiments, the molding process of a material can be injection molding. In some embodiments, the material can be a plastic, bioplastic, rubber, or combinations thereof. In some embodiments, the molding process of a material can be wet pressing, dry pressing, transfer molding, thermoforming, or combinations thereof. In some embodiments, the material can be paper pulp, bagasse pulp, hemp pulp, bamboo pulp, wood pulp, recycled pulp or combinations thereof. In some embodiments, the material can further comprise resins, wax, plastic, bioplastic, or combinations thereof. 
     CONCLUSION 
     While various embodiments have been described above, it should be understood that they have been presented by way of example and not limitation. It will be apparent to persons skilled in the relevant art(s) that various changes in form and detail can be made therein without departing from the spirit and scope. In fact, after reading the above description, it will be apparent to one skilled in the relevant art(s) how to implement alternative embodiments. Thus, the present embodiments should not be limited by any of the above-described embodiments 
     In addition, it should be understood that any figures which highlight the functionality and advantages are presented for example purposes only. The disclosed methodology and system are each sufficiently flexible and configurable such that they may be utilized in ways other than that shown. In particular, the elements of any flowchart or process figures may be performed in any order and any element of any figures may be optional. 
     Although the term “at least one” may often be used in the specification, claims and drawings, the terms “a”, “an”, “the”, “said”, etc. also signify “at least one” or “the at least one” in the specification, claims and drawings. The terms “including” and “comprising” and any similar terms should be interpreted as “including, but not limited to” in the specification, claims and drawings. 
     Finally, it is the applicant&#39;s intent that only claims that include the express language “means for” or “step for” be interpreted under 35 U.S.C. 112, paragraph 6. Claims that do not expressly include the phrase “means for” or “step for” are not to be interpreted under 35 U.S.C. 112, paragraph 6.