I think this is possibly the best kids book I've ever read. It rhymes, so there is a real flow - and my young follower, who was 6 easily supplied all the end words at the right points, which I thought was quite funny, because being a boy, he couldn't read, but he had more or less remembered every word of this book.
We just loved the story, the frog with his pond, the cat, the dog and a bird - overload the broom to the inevitable snap point - but the witch is too generous to worry about details like that, and anyway she simply magics up a new broom at the end of the story, a new de-luxe version. There's a dragon, who is scared away by the joint, although unplanned creation of a monster, covered in mud.
It seems to appeal to adults and kids equally - which is what you want - if you have to read it about 50,000 times.