Upper Deck Kids Codes are worth while.  I have been doing this website for about a year on various accounts, and so far i have gotten 6 Video Games, 5 Ipod Shuffles, a Zune, 4 36 Pack Boxes of cards, and a few other things that i cannot think of right now.  How it works is you buy the packs of cards, or buy the codes from ebay sellers, enter the codes, and in maybe 2-3 months you should be able to accumulate the amount of points to earn yourself a good prize.  Some of the time when you click on a prize it says that it is out of stock, but if you stay consistant watch that desired item, or watch for new things to be added to the Prizes then you can get your hands on many great things.  Take it from me I know i've already done it.