Catapult - Leonardo Da Vinci Kit # EDU-61009 Learn how Leonardo da Vinci improved the catapult design From da Vinci's priceless and awe-inspiring notebooks Accurate model of da Vinci's innovative design Requires no special tools Fully illustrated instruction manual Learn how Leonardo da Vinci improved the catapult design From da Vincis priceless and awe-inspiring notebooks Accurate model of da Vincis innovative design Requires no special tools Fully illustrated instruction manual