One hippo, all alone, calls two hippos on the phone. So begins this counting story, in which exuberant hippopotamus guests show up in ever-increasing numbers, until an all night party is inevitable.
The book is nicely illustrated. It is supported by a simple narrative written in rhyming couplets with a nice rhythm, which makes it good for reading aloud. The book incorporates counting as the Hippos arrive in groups of increasing size (i.e. 2, 3, 4, …, 9) and leave in groups of descending size (9, …, 2).
Great fun. Recommended.