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Continue circular motions with your wrist to maintain or further increase the rotational speed and intensity of your workout
Order the EcoSavers Draft Stop Cover
they will bounce slightly
Lightning or USB-C - maximum input current 1
POWERplus 3-in-1 Spring Powered STEM Kit energysaving Continue circular motions with your3 in 1 Buildable Models The POWERplus Junior Spiral Spring set allows you to build three different working models from one kit: a wind up racer, a walking robot, and a helicopter with rotating propeller. Each model demonstrates motion in a unique way. Spring Powered Mechanism All models are powered by a hand wound spiral spring. By turning the winding mechanism, energy is stored in the spring. When released, this energy is gradually transferred to