Skateboarding has a history longer than extreme sports will lead you to believe. It used to be that people thought of skateboarders as slackers, but it requires much more athleticism and talent than one might think. What it doesn't require is a lot of spending or any major equipment. A basic skateboard setup is pretty simple, and once you get rolling it doesn't get much more costly.
'''Build Your Own''': To build your own custom board, you'll need some basic equipment: More searches on Skateboarding