GraviTrax Volcano Expansion Marble Run

“Cause an explosion with the VOLCANO, unleashing new energy into your marble run! When a marble rolls into the push button of the volcano, it triggers an eruption launching up to 3 marbles down the tracks. 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 experimen…