Build this cyborg hand from kit form Contains 203 easy-to-assemble pieces. No motor, no battery just powered by hydraulics. Excellent STEM learning for ages 10+. Splash into the world of robotics with this hydraulic cyborg hand, which is powered by water alone no need for a motor or batteries! Suitable for ages 10 and older, it comes in kit form, so its loads of fun to build and its a great way to teach kids about clean energy and engineering. Ticking the boxes for both entertainment and education, its a fantastic STEM toy.