Ravensburger Marble Run GraviTrax POWER Additional Parts Trigger 26202 1 (Slope Toy) (GraviTrax Power)

This is an additional part trigger for the GraviTrax POWER series. When the ball passes, it sends a signal to other parts that have their lamps set to the same color. A starter set is required to play with this product. All Gravitrax series are compatible. Uses 1 AAA battery (sold separately)