A skateboard is a four wheeled platform used for the activity of skateboarding. It is propelled by pushing with one foot while the other remains on the board, or by pumping in structures such as a half-pipe or bowl. A skateboard can also be used by simply standing on the deck while on a downward slope and allowing gravity to propel the board and rider. That having been said, the skateboard can't be concisely defined. Unlike most other sports, yet not unlike most other modes of transportation, n… (More on Skateboards)