Investigate physics using technology from medieval times! Build six sleek, updated models of catapults, trebuchets, and other medieval launchers. These classic siege weapons from the middle ages also happen to be great tools for teaching physics, including lessons in force, energy, motion, and projectiles.

A catapult is a medieval ballistic device that uses mechanical rubber bands and counterweights to fling projectiles in this case, foam balls into the air. The 32-page, full-color manual has illustrated step-by-step instructions for building the models and conducting the experiments.

Bonus: Also includes folded cardboard blocks so you can build a pretend castle wall and see if you can knock it down.