Science Fair Projects Related to Diabetes Management

A few months ago I found out that the University I attend has a science fair. It's an informal deal- no judging. No official program. Just a bunch of boards in the pit (informal dining area/study hall in a classroom building), with the names of one or more students and one or more professors. Some of the boards were really basic presentations of math ideas; some were over my head presentations of meteorologic ideas; one really cool board was about staph infections of a particular sort and had been done in conjunction with folks at the hospital I stayed at in September. The guy who presented that board was there and explained it to me- he was studying a less virulent strain of an infection that primarily kills hospital patients.
For next year, I want to do a science fair project. I'd like to test something that hasn't been tested but is fairly simple, and that has the potential to be useful. I got to thinking about what sort of things would be useful for me, diabetes wise.
One worry I often have is that my insulin has been spoiled; too hot, too cold, too old... whatever. I'd really like to be able to squirt a half unit or a unit of insulin onto some cheap thing (like something I could make myself) and see something that would allow me to know if the insulin was fresh or not.
So I've been thinking that perhaps I'd use the leftover Lantus from a way past month (like January's) and a few units of current insulin, over the summer, and try squirting them on things and see what happens. Maybe the preservatives break down, whatever. Before summer, I'd hopefully read up on some of the preservatives and their various reactions to stuff.
Anybody have a better science fair idea? Ideas for how I should get started on this one? Recommended reading related to this one?

Turns out last night I was on my way up... five hours later, no more food,259. Yuck yuck yuck.