Wards Essentials Trebuchet Kit, Material: High quality precision-cut Birch verner pure bond plywood, Designed to be safe and robust, Dry firings and heavy projectiles are no problem, Holes are pre drilled, Medieval weapons, engineering, and physics, Beam arm: 21in
Catapult kit to explore force, acceleration, Hooke's law, parabolic trajectories by building and testing a fully-functional catapult. Contains catapult base, sides, lever arm, rubber bands, screws, dowels, hook, ping-pong ball. Aids in conceptualization of abstract mathematical ideas
precise project launcher, 16 mm steel balls at ranges suitable for use on the bench top or from the bench to the floor, protractor and plumb line make it easy to set any required launch angle from 45 deg downwards to straight up