Here are some poems on the themes in No Kidding. Perhaps you could try writing your own poems on friends, falling out, sharing and arguments.

Co-operation A see-saw only works if you’ve got a friend on the other end. Tony Langham

Friendship I’ve discovered a way to stay friends forever- There’s really nothing to it. I simply tell you what to do And you do it! Shel Silverstein

Name-calling
They called me frog-face with ears like a bat.
I said, “I’m not – I’m worse than that”.
They called me rat-nose with a tongue like a shoe.
I said, “Is that the best you can do?”
They call me mouse-eyes, skunk-breath, dog head.
I said, “I’m worse than all that you’ve said”
They said. “It’s no fun calling you a name”.
I called, “That’s a pity – I’m enjoying this game”.
Charles Thomson

Write about a special friend. What is it about them that makes them special?
If each child finds one good thing to say about each of their class mates you will have a class full of positive poems and each child will have 30 positive comments about themselves.
Or try the acrostic structure:

These are some we wrote (very) quickly. I’m sure your children could do better!