I a pal o mine can play "Over The Rainbow" on his Musical saw, why not try it on the Kazoo? I, however, have always been particularly fond of "Stormy Weather."
Don't forget that an empty toilet paper roll with tiny needle hole in waxed paper afixed via rubber band is the finest money doesn't buy, & teaches the value of recycling. Ever tried a paper towel roll? Man, that is far out!