Learn how to build robots and explore renewable sources of energy while having fun, with the 12 in 1 Solar Hydraulic Construction Kit. The 212-piece kit lets you build 12 different self-powered robots using solar or hydraulic power, so they never need any batteries. Full instructions are included and will let you create an array of fun robots including an elephant, buggy, digger, scorpion, ostrich, pterodactyl, crocodile, T-Rex, bulldozer, forklift, monkey and a master and dog. Building and exploring this collection of robots is a great way for children and big kids to develop and explore STEM subjects and learn while playing. Suitable for ages 8 and over.