The first player makes a wish. The second player must first grant their wish, but with a dastardly twist AND second, make their own wish. Remember not to be mean or say things that are inappropriate!
Example:
Bob: I wish I was taller!
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Bob: I wish I was taller!
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Fred: Poof! You're 40 feet tall and can no longer fit inside your house!
My wish is to have summer vacation get here now!