Control your marble’s path like never before — handsfree! As a marble passes through, the POWER Trigger signals the POWER Switch via radio (RF) waves to shift the direction the next marble takes along your track! Power up the possibilities and build even more complex marble runs! Makes an excellent addition to your existing Starter-Set; completely compatible with GraviTrax components for continuous fun. GraviTrax is an ideal birthday or holiday gift for creative kids and future engineers!

GraviTrax construction sets are a creative, expandable track system that challenges children to use their imagination to design and build their own marble runs! STEM-friendly concepts build critical thinking and problem-solving skills. Completely open-ended, every GraviTrax set has a boredom-busting variety of play options for hours of fascinating fun. Master the basics, then add expansion sets to propel those metal marbles around the tricked-out track of your dreams!

Comes complete with instructions, 1 Trigger, and 1 Switch. Requires 3 AAA batteries, not included.

Lasting durability for girls and boys ages 8 and up; it’s the learning toy children (and savvy adults) return to over and over again!

1 Trigger, 1 Switch, 1 instruction booklet, 1 warning booklet