I seem to recall an old recording of Gerhard Hoffnung with a symphonic piece rendered for toy instruments, including kazoo. If you could find that, it might provide some inspiration. And inspiration always helps when you're playing a kazoo.

It would be interesting to know if anyone is aware of kazoos being mentioned in any folk song. The only one I was able to find in the DT (and here we're using "folk" very liberally) is my own The Perennial Beginner, or the F-Chord Song, which, in the only public performance I know of, ended with a kazoo solo. Keep on buzzing!

Aloha,
Mark