Model, Multiple pendulum Demonstration, consists of a large acrylic frame and nine pendula with 1 in steel ball, initiator stick to simultaneously release all pendula
Botley* the Coding Robot Classroom Set, Age 5+, Grade K+, 239-piece, with two 77-piece Botley the Coding Robot Activity Sets, two additional 45-piece Coding Robots, and one 41-piece Robot Action Challenge Accessory Set