TUNNEL - the Extra Set for surprising tunnel systems
Hidden paths beneath the surface
With TUNNEL, you add excitement and depth to your marble run. The marbles disappear inside the run and roll invisibly through clever, winding tunnels until they suddenly reappear somewhere else.
This turns your marble run into a three-dimensional experience full of surprises. TUNNEL expands classic courses, connects levels and sharpens the sense for what lies beneath. The perfect set for all who love to discover what happens below the surface.
Extra sets expand the starter sets and offer additional fun.