https://www.youtube.com/watch?v=dAyDi1aa40E

If anyone's interested in seeing a "practical" use of soap bubbles, that's a 5 minute numberphile video that uses it.

Also, here's a terrific recent paper on computing fancy multiple soap bubbles:

Double Bubbles Sans Toil and Trouble: Discrete Circulation-Preserving Vortex Sheets for Soap Films and Foams