When baby says “bah”, his family scrambles to see if he is saying ball, or bow, or perhaps brother.  Maybe he is trying to say block, or bottle or bear?  Finally, they realize that baby is just trying to say “bye-bye.”  I highly recommend this book for purchase because it would be the perfect book to incorporate dialogic reading into a story time and provide an excellent prompt for preschoolers to think up words starting with the letter “B”.