For example, actors in a crowd who are listening to a speaker may nod and look at each other to show how they are responding. If a crowd gets so active that the movement of the actors distracts from the lines being spoken, though, then that action is inappropriate. Even rehearsing for something as exciting as a play can become dull with all the necessary repetition. To relieve the tedium and pressure of practice, intersperse rehearsals with set-making days. For scenery, stretch another row of sheets or craft paper at the back of the stage and paint the scenery directly onto these or use the natural setting of your yard.
Simplicity is the key.
The sets don't have to be exact but should aim to give the impression of the scene. Costume design and preparation can also break up the routine of rehearsal and can utilize more children. If a play based on the Bible is performed, a church may lend Christmas pageant costumes for the production. If those aren't available, bathrobes and towels make sufficient replacements. A good idea for any other play is to set it in the present so that the children can concoct costumes from home wardrobes or from secondhand stores.