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.

• Build 6 functional models of catapults, crossbows, and other medieval siege weapons that launch foam balls and soft darts
• Learn mechanical physics with simple experiments that demonstrate topics like force, energy, motion, and projectiles.
• Durable plastic pieces can be reconfigured in a variety of ways; build models from teh manual or create your own!Have fun with the included knock-down blocks
• Learn mechanical physics with simple experiments
• Discover the world of physics and projectiles