This set comes with forty pieces that can be assembled, taken apart and reassembled into an endless variety of figures and contraptions. An excellent activity for developing grasping, manipulation, problem solving and imaginative play. The set includes planks, nuts and bolts, wheels, and various other pieces along with a combination wrench/screwdriver, all made of sustainably harvested rubberwood with water-based stains which will not chip, flake or fade. Use the included guide to get you started making six different figures such as a racing car, an airplane, a robot and more. From there, the only limit is your child's imagination!