Inkology 3D Lenticular Slider Pencil Cases, 24 Piece Value Set, Design May Vary (03186) Lenticular printing produces images with an illusion of depth, 3D or the ability to change or move as the image is viewed from different angles Sturdy firm plastic with snap closure Assortment of designs with a wide range of vibrant, colorful themes Holds your pencils, pens and small sundries Lenticular design flickers and wiggles