SHAWE Screw Set of 16,Jumbo Nuts and Bolts32 pc in 4 different shape and colorsExplore Fine Motor Skill Toys for Toddlers Preschoolers,Therapy Tools,Educational Learning ToyKids Safe Material LEARNING: Manipulating the nut on the bolt is a great activity to develop toddlers fine motor skills;Bright colors and different shapes showing kids.which can be used for color ditinguish and shape recogniztion;The nuts can be very easily crossthreaded on the bolts. This is frustrating for young hands and requires assistance to get the nut unstuck EDUCATIONAL:32 piece jumbo nuts and bolts ,Nuts & Bolts that fit together easily,Use your fine motor muscles to screw and unscrew these large plastic nuts and bolts!Improves manual dexterity, hand-eye coordination, color recognition and pairing, shape sorting, increases attention and focus.Create games and activities with these nuts and bolts to create a fun and exciting way to learn!The best part is learning while playing. LOVE : The big jumbo nuts is a really fun toy.Parents can race with kids when screw and unscrew, who will be faster to complete it.make kids happier.giving much more time along with children,love each other more.it is a great toy. the best bridge between parents and children.all the family are getting together playing the nice sets. SAFE: 16 Complete Plastic Nuts and Bolts Set - 32 Pieces - Includes 4 different shapes(Square, triangle, cross, hexagon) - 4 various colors (bright red,yellow,green,blue);Large Size: bolt 1.65''4.2cm - 1.97''5cm and nut height 2.2''5.5cm;big enough,not worry swallowed by babies,suit for any age kids,even my 5 months old son can graps the screw toy playing.The screw is made from non-toxic PE material PORTABLE&GUARANTEE : Screws are packaged in a durable soft Flannel Pouch Bag,Easy to Collect,also your kids will develop a good habitat to tidy up theirselves toys;30 day no questions asked return policy and free return,SHAWE Customer Service is alway here waiting for you