Leonardo da Vinci Catapult KitDescription Catapults were first invented in Ancient Greek and Roman times, however our common idea of them is based on drawings we have from the Medieval Ages. Leonardo redesigned the catapult around 1485, and used the springlike energy stored in bent wood to give power to the swing arm. Comes complete with all pieces pre cut and ready to assemble Glue included Suitable for beginner model makers Easy to understand instructions Technical Details