My son was given a microscope for Christmas so we spent part of the afternoon playing mad scientists. We looked at celery, a leaf, a flower petal, bark and algae. When we ran out of premade slides he came up with some specimens of his own-fuzz, a strand of hair and a pair of plaid boxer shorts.
P.S. I apologize for the post title. If you're anything like me, you'll be singing that song all day.