Buying bikes and skateboards is like buying a guitar. You buy junk, you’ll spend less and less time learning or doing anything worthwhile with it. I know a lot of guys who bought crap bikes from the TarMart who would otherwise have spent a lot of fun time on the trails, but instead got disappointed and disinterested when the brakes don’t work well, the bike is poorly balanced, the derailleur comes apart, etc. Junk skateboards are the same problem. A kid wants to learn to skate and sees the other kids at the skatepark doing fun, inventive things seemingly effortlessly. And then he has to work himself to death getting a chainstore board to perform like a good one, which it can’t. – you can’t learn like that. Cheap guitars were a bane of my dad’s store just after Christmas. Too many grandmas saving a few bucks and getting Li’l Johnny a toy guitar- that can’t be reliably tuned, can’t be repaired when the neck twists or breaks, and therefore can’t be "learned on ‘til we see if Li’l Johnny has an interest’. Lots of kids gave up learning to play because their guitar needed more working with than got played.