This is a song I wrote to go with a first grade unit on butterflies. We had caterpillars in the classroom and watched them transform. The song is fun and helps students learn the science vocabulary as well as some food items. In the song a caterpillar gorges himself on a watermelon, then an apple, and finally just a cherry. Now the very fat caterpillar just wants to go to sleep. I must have been influenced by Eric Carle's "The Very Hungry Caterpillar" story.