My 5-year old and 3-year old were not into it. The book was too long and boring for their attention spans. I would say maybe they are not into Dr. Seuss poem style books but they have other Dr. Seuss books that they like. I bought 5 dinosaur books and this was the one they liked the least. There are some great dinosaur books out there but this isn't one of them.
My son LOVES this book. They had the theme of cat in the hat at daycare and he is interested in dinosaurs; the combination of the two in this book is really great. The book breaks down on how to pronounce the names of the dinosaurs and maintains the rhyming theme. Great learning experience.