Kids explore the mechanical power of liquid in motion—as they build their own hydraulic machines! Our kit includes 4 step-by-step activity booklets and all the reusable building pieces kids need to create 4 different hydraulic machines—from a working drawbridge to a crane that really lifts objects. Plus, we’ve included syringes and tubes kids fill with water and connect to each machine—learning how to convert energy as they set each machine in motion! The kit includes 4 activity booklets, a hydraulics information card, 126 sturdy plastic building and testing pieces, and a guide. Longest building piece measures 6 1/2".Additional Information