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Automate your marble run and send those spheres racing via radio signal and remote control with our GraviTrax POWER Launch Starter-Set! Launch your next marble automatically with the GraviTrax POWER Starter-Set! The POWER Starter and Finish are linked via radio signal; as one marble finishes the race another is sent on its way! Or use the POWER Controller to be in charge! Easy to connect and build the set includes POWER accessories to create buzz-worthy customized marble runs completely compatible with all GraviTrax sets. Design the marble run track of your dreams in a race to the finish of exciting educational fun!