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Winner of the Parent’s Choice Silver Honor award, this is the construction and experimentation kit that teaches the laws of physics. Children build up to 36 models including a windmill, two-speed crane, and a sail car, and conduct up to 37 experiments, resulting in a fun, engaging play while learning the fundamentals of mechanical physics. The 305-piece set includes gears, levers, screws, inclined planes, pulleys, wheels, and axles. Children begin by building a simple pulley and move on to more complex machines such as a pendulum clock, a force scale, a mars robot, and a hammer machine. Children conduct experiments outlined in the 64-page, illustrated manual that also provides examples of real-world applications for each machine. Requires two C batteries for the motor. Ages 8 and up. 14 2/3" L x 11 1/2" W x 3" D. (3 lbs.)