It's such a good idea for a children's picture book: an illustrated guide to colour idioms like "tickled pink" and "out of the blue." And the illustrations are gorgeous and the explanations easy to understand. My only criticism is that it doesn't make much sense to do a book like this without explaining the origins of each phrase. Understandably, some phrases may be more difficult to trace back than others, but it would have been nice to see some effort at explaining their roots. After all, many of these idioms are difficult to really understand (and remember) without knowing where the phrase comes from.
