Marble Run 100pcs Colorful Magnetic TilesThickening the transparent pipe can improve the visibility of beads rolling, exercise children's visual tracking ability and improve concentration; The magnetic force is strong and stable for a long time; Large size is suitable for young children to grasp; Transparent drilling surface design, refraction dazzling light and shadow effect; More abundant pipe ball play! The combination of magnetic pieces makes the scene structure more stable; From plane