Combine cymatics on non-newtonian fluids, and evolutionary programming
At youtube there is a movie about cymatics and it shows a guy (Collin?) using a non-Newtonian liquid (corn starch) to produce forms. The movement makes the liquid go solid, building a base. At the top, the liquid doesn't move that much anymore and forms a solid again. This combines into a sort of fountains running around in a huddled mass.
This gave me a todo thought: copy this set-up, point a web-cam at it, and have an evolutionary program send it sounds with the task of creating a certain shape. Looking at the result, the computer would run tests and try to find the right "music" to create the shape you are looking for. One cool thing would be an egg shape, or something that looks like a single fountain. Actually, anything repeatable would be cool enough for me.