I've enjoyed several of these crazy Hawksley books. They're not much for being educational, but not every book your kid reads has to teach something. Sometimes silliness is a valuable lesson to learn. In this story, Doctor Kangaroo's patented treatment is to send every patient to bed with a bandage round their head no matter what their complaint.
What I liked about this story is that it didn't know when to stop. Even after the Kangaroo story it plunged into yet more silliness, which felt like getting a couple of bonus books. I recommend this one for the fun and general all-around goofiness. The artwork is rudimentary but no one in need of a book like this is going to care about that.