While playing at the beach, two boys begin to wonder why the sky is blue and ask their mother to explain the reason to them. As they are very young, their mother needs to decide how best to explain to her boys. She discusses the phemen of the blue sky in a manner that even her six year old can understand. While addressing their initial query, the boys come up with several other related questions, and the mother answers them all with simple facts and drawings. To make it easier and more interesting, she performs a fun experiment with her boys, which shows them why the sky is blue at sunrise and red/orange at sunset. The book is a must have for all those curious kids who are trying to make sense of the world around them, and for all those parents who want to satisfy their curiosity.