Summary: $75. It uses a pressure-sensing balance board like in the picture below. The Wii Balance Board can sense motion and is used to play sport games like soccer, ski, aerobics and even yoga. The company plans to launch Wii Fit on the other markets due to the success of the Wii console. Nintendo has outsold Sony's PS3, which is more expensive and not so funny. Wii Sports gained
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Image originally found here.