System Compatibility: This marble run set works with marbles up to 16mm in diameter. In addition to the marbles included, kids can mix it up with marbles from other brands for endless racing fun and exploration!

Electric Lift: This marble race track includes an electric lift, which you can easily power by adding two 1.5V AA batteries (Not Included). It adjusts to the max height of the building blocks and automatically transports marbles smoothly onto the track.

Fun 3-in-1: This marble run is more than just a toy set! Our building blocks and track designs help develop kids' cognitive skills, construction abilities, spatial awareness, and hand-eye coordination. While having fun, your child is also learning and growing!

Accessories Included: The motorized marble run includes 123 plastic blocks, and 30 plastic marbles—just snap everything together and let the fun begin!