What are you talking about ??
As a 12yr old, you are under your parents care, and being under your parents care, you as a 12yr old, ask nicely, "Mom, Dad can we as a family get a iMac please, as in the refurb store at apple.com there are some great bargains"
What do you mean "every 12 year old gets iMacs and you can't" ?? Has every 12 yr old have a iMac do they ??