True Fun & Enjoyment For All The Kids!! Gamecraft Safety Guard Scooter Boards?are made of heavy duty plastic with safety guards that come with non-marring, double ball-bearing swivel casters.Supervision is highly recommended when using these boards. To ensure a smother ride it is ideal to wear protective clothing/gear with nothing hanging?loosely. The?Safety Guard Scooter Boards are equiped to handle a reasonable amount of weight so for safety considerations, please limit weight on scooter boards.? Protective clothing and equipment should always be worn Do not stand on this unit Dimensions 12in L x 12in W x 1in H