How can I get a paypal account without my parent's knowing?

My parents are a little overprotective, and wouldn't allow me to get money for my art over the internet. That being said, I need a way to collect payment for commissions and donations, in a way that is discreet and not connected to any credit card. I also need this account to be safe for a few years, until I can access it later when I'm older and out of the house.

Please don't say anything about "just tell your parents and they'll understand", because you don't know them, and they are complete control freaks. Also, don't say I'm too young, because I'm really not.