There are some absolutely wonderful children's books available and i echo the mom who said she got rid of the ones that she didn't want to read... that's for your own sanity! (I finally told my youngest that I 'lost' her New version of Snow White because of hated it so much!!!)
but I wanted to add Eric Carle to the list - Very Hungry Caterpillar is a big fav of mine.
Tomie dePaola has cute drawing and stories.
Also the "If you give a mouse a cookie" books
the suggestion for looking at past Caldecott winners is excellent.
I was in the bookstore business and although we did not like every single winner, they are an excellent source to look through and expose your children to a variety of artwork.
A wide selection will contribute to your children's viewpoint and attitude about art.