Amy.....try Twerppoets suggestion of a reset first and see if that makes a difference, if not, do you have warranty on your iPad still? If your iPad doesn't show any dints or other damage, Apple will probably swap it out for you if you do have warranty or are just out of warranty, worth a try regardless.
If you don't have any warranty left, have a look at this thread and show it to your parents please before trying it yourself. I wouldn't ordinarily recommend this but if you have no warranty left, then there is nothing left to lose.
http://www.ipadforums.net/new-member-introductions-site-assistance/59195-ipad-screen-colors-all-messed-up.html