What is inside THIS box?

Monkey has a big box, which he tells Cake has a cat inside, but only when the box is closed; Cake suggest that maybe it is a dinosaur instead, and the two friends puzzle over how they can solve the problem of finding out what is in the box, if it is always empty when opened.

Main Author: Daywalt, Drew
Format: BOOK
Language: ENGLISH
Published: Orchard Books, an imprint of Scholastic Inc 2019
Series: A Monkey & Cake book