an unusual observation

[kamocat]

At this rate we could just play marbles.

But no, I still like that stuff involving tones and intervals. I suppose we could have something where the robots move around the area, find the data ports in the walls (each which has a few kilobytes of memory to store a waveform), and try to assemble a wave sequence to unlock some sort of code. Or they could be given sheet music which they must read and play (and then post in the .abc format. bonus points for making up lyrics to go along with it)

This is only the 80th post, and it's already way past feasible. What was I saying about making FIRST actually consider the ideas in this thread? This stuff might be usable in ten years or so.

How about really fun and funky stuff, like ferrofluid, non-newtonian fluid, or jello?

(and now for my 4th edit)
What about different sized balls, so each makes a "boing" of a different pitch? Some could even be filled with different liquids or gasses (helium in one, nitrogen in another, argon or xenon in a third)