Add the dimension of sound to your Quadrilla runs with a xylophone rail that plays a musical scale as marbles race over it.Build the layout pictured on the box and connect to an existing Quadrilla set. Listen as your marbles descend the xylophone rail. Reverse the direction of the rail to play a different melody.
 
• Marble-run construction toy made with durable wood and non-toxic, water-based paints
• Includes 2 distributor blocks, 2 stabilizer rings, 8 marbles, and one xylophone rail.
• Xylophone rail plays as marbles run down
• German-engineered design inspired by Da Vinci Circle
• Helps to develop spatial thinking and an understanding of Science, Technology, Engineering, Art and Mathematics (STEAM) principles
• Praised by The Wall Street Journal as the perfect toy for teaching children how to code
• Compatible with all Hape Quadrilla sets_x000D_• For ages 4+WARNING:_x000D_CHOKING HAZARD-Small parts & small balls. Not for children under 3 years. This toy meets the European and American safety standards EN 71 and ASTM F963. Remove the packaging mate