Yes, Zuko that would be manipulation which is put in the category of unethical magick (Black magick). I wouldn't recommend forceing your will onto another unless you know what your getting into and can handle the consequences. I know I made it sound a bit blunt but I don't see any other way to put it. Try mundane ways first such as talking with your parents and making a deal, like doing extra chores or something ask them what would they like you to do to earn a ps3 or what not if you don't like it try to comprimise.
But there are spells to help you get a job,or improve yourself to earn such things, or charm them (Just don't force your will onto them and you should pretty much be okay).
I hope you find a way to get what you need and want in a positive way ( In the long run it'll be better for you as well)
Added to all this, money is scarce in these times, so it would also be a financial hit, how fun would all that stuff be when you can't afford your school books, uniform (if you have one) no lunch money, none to go on trips with friends, and none for basic needs.
A ps3 wont be so fun when your electricity is turned off?