How to Deal With Your Kid's Annoying Friend

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Monitor behavior.

If your child's friend tends to act up when left to his own devices, find a way to keep him under watch when he's around. For instance, instead of sending the kids into the backyard—where they could potentially get into trouble—offer to play a board game. You'll get to know your child's friend a little better, he’ll be more aware of your presence and he'll be less likely to act up.