?Ã²Build exciting marble track creations with the Ball Track - Basic Pack Switch Track! An exciting add on or stand alone marble ball track set for exciting physics experiments. Compatible with all HABA Building systems! With the power pulser track, arriving marbles transmit the impulse to the awaiting marbles. The switch track ball provides twice as much fun: one impulse, ?Ã» two effects. Features beech wood from domestic forests as well as sturdy plastic elements. Contents: 4 speed curves, 1 power pulser track, 1 speed snake track, 1 switch track ball with ramp,1 sound block, 3 ramps, 9 rectangular blocks, 6 cubes, 3 dominoes, 6 building block clamps, 6 marbles.