Audience participation in children's theatre performances

The gardener picks up a fir cone and rolls it through the quiet room straight towards a small child in the audience. Either the child leaves the fir cone lying where it is, or perhaps picks it up. Perhaps the child will later roll the fir cone on towards another child. Or make a gravel track around its mother. Maybe the child kneels down beside a bed full of branches and twigs and feels the material. And maybe it will later join the gardener in making a rhythm by knocking sticks. Whatever the case the child will decide.