Send the marble in the reverse direction with the Flip! As the marble rolls into the Flip, it releases and transports up a level, slinging it in the opposite direction. This accessory also includes 6 additional tracks and must be combined with the GraviTrax
Starter Set. GraviTrax is a modular, electronic-free interactive track system where you can design and build your own marble runs. This STEM toy for boys and girls 8 and up, encourages experimenting with gravity, magnetism, and kinetics to propel your marble to the finish.