This is a solid RuggedRiggs steamroller. Only used indoors but would be really fun in the sandbox. Rolls so smoothly we never took it outside, great even on carpet (smokefree house. Loved, but still in great shape. Can't find these in stores these days, and they just don't make them this solid anymore. Safe for little hands- my boys started loving it at 1yr and it still held their interest until the youngest just turned 5.