et more spinning and more surprises with the Hape Quadrilla 160-Piece Grand Spirals Playset. This set includes a xylophone rail that plays a tune as marbles run over it, two double-sided spiral twists, plus four special control blocks to randomly distribute marbles. On the concave side of the spiral twists, marbles move to the center; flip the spirals over and marbles travel outwards. Playing with the set helps to develop spatial thinking and an understanding of Science, Technology, Engineering, Arts and Mathematics (STEAM) principles. Product Features: Praised by The Wall Street Journal as the perfect toy for teaching children how to code, Quadrilla toys help to develop spatial thinking and an understanding of Science, Technology, Engineering, Arts and Mathematics (STEAM) principles A tune plays when marbles run over the musical rail and makes your children amused in their playtime The different colored see-saws send marbles in different directions
