I eat my peas with honey, I've done it all my life.
It's kind of like the kind of joke a young child would write. It's not very funny, and the whole book is based around it, which is just bizarre. Maybe a young child would find it funny, but I don't. It's not bad, but it's not great. Contrary to the quote on the back by Parenting Magazine, I don't think it will make children eat their vegetables. It might actually make them sympathize with them, which would be the opposite of your intention.
Message
Eat your dinner so you can get dessert. Or, peas are just like people.