I bought this book back in the early 80's when my sons were born and this last purchase was a book for my 16 month old grandson (I wore out the 1st book!) I still believe daily reading from this book with my first son helped produce his 3 and 4 word sentence vocabulary by the time he was 1 year old. I give this book as a either a shower gift or 1 year birthday gift to everyone I know who's having/has a baby. It's was wonderful teaching tool for a new parent.