As tiny babies (2-3 months) my kids loved Ooh, Ooh, Moo . It has black and white animals that they focus on. They loved it!
As they grew (6 months and up) they loved Pat the Bunny , Goodnoght Moon , The Very Hungry Caterpillar , and also the Sandra Boynton Books, especially Barnyard Dance .
Clack, Clack, Moo is very funny for preschoolers/Kindergarteners.
Oh! Another favorite...Mr. Brown can Moo, Can You?