My boys are crazy for Pokemon cards, since they have been here my and my Mema have spent over $100 buying these cards so they can play them. But who really understands this "game"?

According to my 7 year olds you collect and trade them. Each card is worth a certain amount of points. Now what happens after you get all these points we have yet to figure out where the game goes from there.

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Nevertheless I'm sure however the game goes it only means spending more money on these ridiculous little cards. If anyone can help a brother out on his Pokemon playing skills it would be greatly appreciated.