Mini Tudou Wooden Excavator - 3D Air Pressure System 3 Replaceable Gripper

The wooden excavator kit is designed to introduce air pressure system and simple machine in a hands-on manner. The wooden model with 3 replaceable 3 gripper & digger teach children about how lever and linkages work. Once made the models may inspire kids to design machines of their own and make connections with the engineering of the full sized machines we see on construction sites. SPECIFICATION Recommend Age: 8+ Material: Real Wood Playtime: About 60 minutes What You Get : Instructions manual x 1 Disposable Syringe x 6 Assorted wooden building parts Assorted accessories