4 boys: 2 older and 2 younger are brothers. If the younger two aren't being little troublemakers then they're getting tickled by the older two or one of them is in cahoots with them and is tickling the other boy
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4 boys: 2 older and 2 younger are brothers. If the younger two aren't being little troublemakers then they're getting tickled by the older two or one of them is in cahoots with them and is tickling the other boy