Made of environmentally friendly new plastic, do not stimulate the skin, non-toxic, tasteless, without BPA polyethylene, laboratory testing approved, the baby can rest assured that use.Create games and activities with these nuts and bolts to create a fun and exciting way to learnThe best part is that your little ones won't even notice that they are learning as they play.13 Complete Plastic Nuts and Bolts Set - 32 Pieces - Includes 4 different shapes - colors & shapes will vary.Preschooler learn how to match shapes & colors and start to develop those fine motor skills as they twist and screw each matching shape of the nut and bolt together. These colorful blocks are the perfect gift for every little kid, regardless of gender. Our interlocking blocks are totally safe for your child to play and experiment with.These colorful blocks are the perfect gift for every little kid, regardless of gender. Our interlocking blocks are totally safe for your child to play and experiment with.Great toy for toddlers and Preschoolers.Manipulating the nut on the bolt is a great activity to develop fine motor skills. Bright colors and shapes provide many opportunities for matching. The nuts can be very easily crossthreaded on the bolts.