Abstract: A toy includes a first platform with a proximate edge, a distal edge, and first and second lateral edges interconnecting the proximate and distal edges. A moving body has a front wheel, first and second rear wheels, and a turning wheel between the front and rear wheels. The moving body is provided with a driving unit coupled to the turning wheel and the first rear wheel. The turning wheel is rotatable about an axis perpendicular to that of the front and rear wheels, and is disposed higher than bottom portions of the front and rear wheels to prevent the moving body from falling off the first platform when the driving unit drives movement of the moving body on the first platform. A connecting rail has a first end portion mounted on the proximate edge, and is connected to a second platform.