It’s time for rollicking and rhythmic fun with Kullerbu’s Melody Domino Set. The cheerful wooden balls are ready for a speedy adventure and this time they can make music. As the wooden balls race down the track, they make a melody on the sound staircase then spin around the steep curves until finally knocking down the dominos in their path. This set includes various heights to achieve maximum momentum. Contents; 1 sound staircase, 2 steep ball curves, 1 start ramp, 1 exit ramp, 9 columns, 3 straight tracks, 16 connecting sleeves, 1 domino staircase, 6 dominoes, 2 balls. Crafted from sustainable sourced beech wood and lime plywood. Designed for ages 2-8. Kullerbü is a flexibly expandable HABA play system that stimulates creativity and encourages children to experiment. Can be combined with other Kullerbu tracks and accessories. Insert, click, done – assembling a play world could hardly be easier. The ramps, straight tracks, and curves have a hole on their lower side, into which the pins of the connecting elements snap snugly into place. Let's go on a swinging Kullerbü adventure from HABA! The Melody Domino ball track brings music into play. When the balls roll down the sound stairs , a happy sequence of tones sounds . Vehicles can also drive on the sound staircase.