Gravitrax Starter Marble Run Set LIGHT 16-mm (5/8-inch) gumballs and includes

16-mm (5/8-inch) gumballs and includes a small supply of gumballs to get started

Build fine motor skills while learning colors

Santa’s Christmas Eve journey occurs in one night

make several for a garden mosaic path

Gravitrax Starter Marble Run Set LIGHT 16-mm (5/8-inch) gumballs and includesWith over 100 pieces and 18 different construction elements, the GraviTrax Starter Set offers everything you need to begin building your own action packed track systems. Discover how the laws of physics affect the journey your marble takes with curves, junctions, freefalls and even a cannon. Experiment using different heights and angles to control the speed of the marble to get it to the finish. Contents Instructions (D, F, EN, NL, E), construction