I'm Forever Blowing Bubbles

This song is the chant of the soccer team West Ham United, which Mr. Curtis the physics teacher likes. Their symbol is the yellow castle in the central / top bubble. A cannon is the symbol of another English soccer team-- Arsenal. This cannon is pictured on the left.

Bubbles also have a lot to do with physics. When a light wave hits a bubble (3rd bubble on the top), the light waves refract off of it, but the different frequencies of light separate because they move at different speeds and reflect differently off the outer and inner surfaces of the bubble.

Different pressures (Inside and Outside) help it keep its shape. (1st bubble on the left).

Different pressures from the air (or water) surrounding a bubble can make it grow, shrink, or keep its shape (1st bubble on the top). If the tension (T) from the pressure of the molecules inside the bubble is greater than the pressure of the bubble's skin, the pressure of the ambient outside air, and the elastic pressure, the bubble will grow (and vice versa for shrinking).