An activating device for light-emitting wheel comprises a wheel, a sound and light generating circuit, a plurality of light emitting elements and a plurality of conductive wires. The wheel has a hub at the center of the wheel, a plurality of spokes radially arranged around the hub and a rim arranged...http://www.google.com/patents/US6241371?utm_source=gb-gplus-sharePatent US6241371 - Activating device for light-emitting wheel
