Katie is psyched for the Parent-Kid Olympics at her school. But it turns out that her parents will be out of town, and so Katie s grandfather is going to team up with her instead. Now Katie is worried-Pops is great, but he s . . . well, he s OLD! Then the magic wind arrives just in time to cause more trouble. Who has Katie switcherooed into this time? Do aching knees and nose hair give you a clue?