The "ball" consists of a plastic outer casing, often with a rubber grip around the centre. Therefore the device is grooved near the axle, so with an externally applied force, the axle will push against the rim. The Powerball (or hand held gyroscope) is a truly dynamic object, there are no batteries and no electricity used, unless you have a model with a rpm counter. The basic theory centres around how gyroscopes act on the environment around them. Once a gyroscope has started, then it asserts a centrifugal force and inertia on objects in contact with it. The speed of the rotation will increase. Effectively this is the same as carrying around a set of dumbbells in your pocket! When first using the device, muscle burn and discomfort can occur, as is normal with any exercise, but this fades over time if used regularly as the muscle will tone and strengthen. They can be used in a fitness, sports, rehabilitation or fun manner. What do you want from your NSD Powerball today? - World Appeal - Totally non-impact at low speeds and medically recommended, NSD Powerball is a handheld gyroscope device that is spreading across the world and it may just

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    Terrific Toys: Neon Glow Powerballs
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