Divide the children into two teams.

Give a man's shirt to each team.

Be sure each shirt has the same amount of buttons down the front.

At the signal, the first person on each team puts on the shirt and buttons all of the buttons down the front.

The one who is buttoned-up first gets to answer the question you ask.

Of course a question equals points. If the answer is incorrect, the person from the other team gets a chance to answer.