5PCS LED MOTION SENSOR MARBE RUN BALLSLight Up Every Run with Glowing Marbles! Take your marble runs to the next level with the SparksMag LED Light Up Balls (5 PCS) a dazzling accessory pack that adds glow, excitement, and motion to every build. Designed to work perfectly with all SparksMag Marble Run Sets, these light up balls bring instant wow to playtime, especially in low light or night play settings. Simply roll them through transparent or glitter tubes to watch the trails sparkle