The sub title of the book says - "Adventures of a Curious Mind".
Feynman, a Genius in many ways, a noble laureate, a Musician, an artist, a pranksters, and much more. The sub-title aptly summarizes the book.
The book is about Feynman's curious mind. The human mind is inherently curious; but curiosity invariably gets deprived if we don't encourage ourselves to go ahead and explore the opportunity that curiosity offer.
Feynman did exactly that, enjoy what ever his mind thought about. The book is a narration of these encounters of a curious mind. The best take away for me is to be able to build on a curiosity and convert it into an option/opportunity.
In case you are in a state of deliberation with one of the curious pranks/attempts of the mind; go read this book! am quite sure you would love to get going with your attempt than think too much about the options that are available...void of curiosity.