This is a gravity track toy that only includes the essential components required for the track (base plate, supports, curved tracks, bridges, and finish line). It is compatible with the original GRAVITRAX. It is recommended to use 13mm diameter metal balls.

这是一个重力轨道玩具，仅包含运行轨道所需的基本零件（底板，立住，圆轨，桥梁，终点），可以兼容原版GRAVITRAX。建议使用直径13mm的金属小球。