Build a tabletop catapult! Leonardo da Vinci improved this powerful machine, a medieval artillery weapon, in the 15th century Send projectiles up to 15 feet! Each model is fully functional; the kit comes with 8 projectiles Plus 6 paper targets Everything you need to assemble each model in 1-3 hours: Laser-cut wooden components, rubber bands, Sandpaper and clear, simple instructions. No special tools necessary