Higher faster further this expandable construction kit includes 5 special music tracks and is compatible with the entire Action Reaction range so your child can build more spectacular play tracks with his marble runLet the imagination run wild with this set your child can achieve amazing effects music sections contain special plates that when touched by the ball on the track play different notes like a real xylophoneBox contents 1 x Galileo Science Action Reaction sound rails science for children aged 6 by ClementoniLearn to play with this experiment box your child constructs a truly unique marble run with which it discovers the basics of physics easily and with great fun again and againA breeze the construction toy is a nice gift for inquisitive children an illustrated guide guides little players through the tasks with increasing difficulty level