The Source 12-in-1 Solar Hydraulic Construction Kit

230 Piece DIY Solar Powered Hydraulic Injection Moulded STEM Construction Project & Experimentation Kit Made from Durable ABS and PP Plastic with Metal Screws that Clip and Screws Together No Batteries Needed as Solar Power Unit Controls Gear Box and On Board Hydraulics to Make the Unit Move Deconstruct and Reconstruct Time and Again to Make the 12 Different Designs Depending on How You Feel Units Vary In Size Dependant on Item Constructed (Average Size ~ 10 cm ) | Recommended for Ages 8+ Includes Detailed Instructions | Takes Around 1 Hour to Create | Requires Some Basic Tools