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
Quantum Minimaglev/Starter Kit, Experience Quantum Levitation with this portable, light weight and easy to use maglev track. includes: Handheld magnetic device Round Dia.15.7in maglev track Medium enhanced levitator (Dia.1.77in) Medium levitator (Dia.1.77in) Tweezers