I remember reading Caps for Sale in my childhood and was browsing children's books and ran across it. It is a story about a peddler who sells some caps, then the monkeys take the caps and imitate him. I like it as much now as I did when I was young!
I enjoy the repetitive language and the rhythm of the writing. The story is also compelling for the kids and me, and there is a bit of shouting and stamping that is always fun for the kids. It is a classic well worth keeping in the rotation.