HAPE QUADRILLA WOODEN MARBLE RUN CONSTRUCTION: MUSIC MOTION - 97 PIECE - Music Motion adds a musical element to the marble run formula! Music Motion includes xylophone keys that are placed into different building pieces, so marble run builders can get even more creative with their construction! Set them up in crazy ways, or why not try having marbles play a tune as they roll down the raceways? Music Motion can be combined seamlessly with other Quadrilla marble run sets. Music Motion Marble Run set is crafted with high quality birch and rubber woods and metal xylophone keys for long-lasting musical marble fun! PLAY AND LEARN ABOUT STEAM: Quadrilla encourages spatial thinking and problem solving as well as develop an understanding of Science, Technology, Engineering and Math principles. This will help develop your little one's fine motor skills and problem-solving skills.