Bubble Art
Stage 1: When teaching a child to blow through a straw, have them put it in their mouth and hold their hand at the other end so that they can feel the air come through the straw when they blow out (instead of sucking in).
Stage 2: Since children are more accustomed to sucking in than blowing out, use water in a glass to show the difference. Place the straw in the water and have the child blow bubbles in the water to practice blowing out.