Add sound to your Quadrilla marble run. A xylophone rail plays a musical scale as marbles race down it, and flipping the rail around plays a different melody. Build the...
Add sound to your Quadrilla marble run. A xylophone rail plays a musical scale as marbles race down it, and flipping the rail around plays a different melody. Build the layout shown on the box, or connect the pieces to an existing Quadrilla set. Kids explore cause and effect, music and engineering while building problem-solving skills.
