The reason I like this book is because it provides a range of useful concepts and words in a single volume. There are many ranges of flash cards which allow you to explore similar concepts with your child, but they're not nearly as portable and handy as having them all within the pages of a book. This also makes it easier to pull it out and work on these concepts with your child whenever you have a few minutes free. It also makes it easier to allow your child to explore these concepts and the pictures that represent them on their own (while you can do this with flash cards they will end up everywhere!). Probably the most beneficial way to use this book is to sit down with your child and let them decide which set of words, or concepts they'd like to read at that particular time. This will not only ensure that they have fun while learning, but also that they remain focused for longer periods of time. However, remember that you should aim to keep any learning sessions short enough that your child doesn't become bored, and as a general rule of thumb, for any one session, aim to work on these concepts for one minute for each year in your child's age before taking a break.

Colin M. Drysdale - How To Raise A Happy Genius