A Q-tip and a petri dish?
How about just tipping the keyboard and shaking?
Reminds me of a "Simpsons" episode when I think Lisa was doing a school project along that line, and after a few days, looked at the dish with a magnifying glass and saw some little creature nailing a list of protests on a church door. "Oh my!", she declared, "I've created little Lutherans!" I about sprayed the coffee over that one.