Waveboard (also called caster board) is a type of skateboard. Its use is not very wide-spread, but it will surely find a purpose among enthusiasts. Waveboard is made of 2 decks joined by a torsion bar usually made of durable steel material. Another characteristic feature are two wheels that can be turned by 360°, independently from each other.
Riding a waveboard is done by leaning on your legs from side to side. This way you create enough energy to propel the waveboard forward without needing to touch the ground.