Light-Up Gyro Wheel combine physics and fun to make for hours of engaging play. Yo-Yo Like Rail Twister with Spinning and Lighting Effects. This light up gyro wheel toy is a battery-operated set includes 2, 8.5 rail twister that both produce a mesmerizing light show. 8.5” Blue and Red Set The fascinating lighting with our gyro spinner effects and movement of the old fashioned toys for kids and spinning toys have a soothing effect that can help curb hyperactivity. Improves Motor Skills: The kids will not only be thrilled by these retro-inspired spinning toys, but will also get valuable hand exercise from all the flicking. The magnetic gyro wheel also presents the perfect opportunity to give your little one a fun science lesson.