Build 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 pulse track, arriving marbles transmit the impulse to the awaiting marbles. The switch trackball provides twice as much fun: one impulse, two effects. Features beech wood from domestic forests as well as sturdy plastic elements. Contents: 4-speed curves, 1 power pulse track, 1-speed snake track, 1 switch trackball with ramp,1 sound block, 3 ramps, 9 rectangular blocks, 6 cubes, 3 dominoes, 6 building block clamps, 6 marbles.