I just received a phone call from a high school student who is doing a
science project.  Last year she contacted me.  Her project involved
putting E. Coli (we got it from a lab) into human milk (freshly pumped),
cow milk, cow's milk based formula and soy formula.  The E. Coli
multiplied like crazy in the formulas, but did not grow in the human
milk or cow's milk, which is interesting.

Anyhow, she won in her school, and got honourable mention in the
province wide fair.

Now she wants to do another project, but I'm not sure what to suggest to
her.  It's got to be relatively uncomplicated (even the "easy" one
described above ended up with complications, errors and messups), and
not take a lot of time.

Any ideas?

Jack Newman, MD, FRCPC