Young engineers can use the included instructions to learn how to transform these colorful collections of nuts, bolts, springs, and hardware pieces into an animal model. Or, forget the instructions and design a unique creation from your imagination. Includes the 5-in-1 SuperTool that works with all OffBits parts. Strengthens fine motor skills, hand-eye coordination, spatial awareness, and more. Includes instructions. Metal and plastic parts. Box is 4 1/2"L x 1 1/2"W x 6"H. Ages 6+.