This is a good introduction to preschool to kindergarden age children. However, I personally think that it could have done better to mention a few more items with the colors. For example, green is used to talk about rice fields. However it didn't focus on why it is so important for the Chinese. It could have mention jade, mountains, etc..
It also didn't cover some of the major Chinese holidays like Chinese New Year, moon festival, and such. It is not badly written, but I honestly thought that it could be better. The text was a bit dry as well...