Under the Lilacs by Louisa May Alcott

It was some days before the children were tired of talking over Ben's birthday party; for it was a great event in their small world; but, gradually, newer pleasures came to occupy their minds, and they began to plan the nutting frolics which always followed the early frosts. While waiting for Jack to open the chestnut burrs, they varied the monotony of school life by a lively scrimmage long known as "the wood-pile fight."

The girls liked to play in the half-empty shed, and the boys, merely for the fun of teasing, declared that they should not, so blocked up the doorway as fast as the girls cleared it. Seeing that the squabble was a merry one, and the exercise better for all than lounging in the sun or reading in school during recess, Teacher did not interfere, and the barrier rose and fell almost as regularly as the tide.