From 900 BC to medieval times, siege towers were common military structures used to climb over an enemy’s ramparts during battle. In this kit, students build a fully-functional model with historically accurate details like removable ladders, a drawbridge to let out imaginary troops, and a torsion-powered catapult that fires clay projectiles up to 4.5 meters! After assembly, students will have a visual representation of how ancient cultures engineered solutions to solve the problems of their time. They can also mold projectiles out of clay and get hands-on experience with levers, torque, and trajectory as they fire upon their friends. Kit includes all parts, soft modeling clay, and step-by-step building instructions. Recommended for Elementary and up. CHOKING HAZARD (1). Not for under 3 yrs.