Da Vinci Catapult
Advanced construction kit. Leonardo redesigned the Medieval catapult in around 1485 and used the spring-like energy stored in bent wood to give power to the swing arm. This kit contains all you need - precut wood and wing pieces, assembly instructions and tools. Assembly takes 1 hour (+, if from scratch). Kit 25cm W by 19 H, for teens + . Appeals to the engineers or experienced construction kitters.