During this lessons children will practice with positive and negative space. Discuss about a face: form, place of ears and eyes (same height), distance between the eyes, hairline (not just on top of the head), the width of the mouth and nose. Every child gets a construction paper and a half construction paper in two contrasting colours. Draw half of a face to the side of the small sheet.
This face must be cut and placed at the center line of the whole sheet. Cut parts out of the half face and place them on the other side. When all parts are cut, everything cn be pasted.