Bubbles are formed when the soap film stretches around air. The air is trapped and a bubble is formed. The bubbles take on a spherical shape, giving it the least amount of surface area possible. Bubbles pop when the water from the soap film evaporates. The evaporation makes the soap film thinner and thinner.
Bubbles also pop when they touch dry surfaces.
Why To have children experience bubble blowing as an art activity. What to Do Give each child his own bowl for mixing. Ask the children to mix some liquid detergent with water. Offer several colors for them to select to tint the mixtures. Make sure children practice blowing out through the straw before they begin blowing into the bubble solution.