Highlights

Create your own action-packed marble run obstacle courses with this interactive GraviTrax Obstacle Set (26866) construction toy for kids
The GraviTrax Obstacle Set includes height tiles, turns, tracks, and 5 different accessories for endless building activities to do on your own or in a group
This 153-piece STEM toy offers a screen-free activity that fosters problem solving, creativity and experimentation for kids ages 8 and up
Design, build and race the marbles through your own obstacle course tracks and use gravity, magnetism, and kinetics to propel them to the finish