There are so many wonderful children books out there. My oldest son was speech delayed. I learned from speech therapists the importance of reading to your children. Not just reading, I already did that, but in pointing out pictures and identifying them. It's amazing the difference that a great picture book can make on the development of a child.
Officer Buckle and Gloria by Peggy Rathman (My personal favorite)
Bootsie Barker Bites by Barbara Bottner (Creative way of dealing with a bully.)
Daugher of a King by Rachel Ann Nunes
The Secret of the King by Rachel Ann Nunes
Mercy Watson Goes for a Ride by Kate DiCamillo
Just the Way You Are by Max Lucado (unconditional love)
Because I Love You by Max Lucado
Just in Case You Ever Wonder by Max Lucado
How Droofus the Dragon Lost His Head by Bill Peet
The Caboose Who Got Loose by Bill Peet
What are You So Grumpy About? by Tom Lichtenheld
Big Pumpkin by Erica Silverman
The Legend of the Christmas Rose by William H. Hooks
My Lucky Day by Keiko Kasza
Madeline Says Merci by John Bemelmans Marciano (good manners)
Diary of a Worm by Doreen Cronin
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DW the Picky Eater by Mark Brown
Alexander and the Terrible, Horrible, No Good, Very Bad Day by Judith Viorst
Harriet, You'll Drive Me Wild! by Marla Fazee
The Little Mouse, The Red Ripe Strawberry, and the Big Hungry Bear by Don and Audrey Wood
Click, Clack, Moo: Cows that Type by Doreen Cronin
Duck for President by Doreen Cronin
The Stray Dog by Marc Simont
Guess How Much I Love You by Sam McBratney
The Rainbow Fish by Marcus Pfister
Heartprints by P.K. Hallinan
Get Well, Good Knight by Shelley Moore Thomas
Ted and Friends by Phil Roxbee Cox & Stephen Cartwright
The Stinky Cheese Man and Other Fairly Stupid Tales by Jon Scieszka & Lane Smith
Three Little Pigs by Susan Page
The Story of Ferdinand by Munro Leaf
Whose Mouse Are You? by Robert Kraus
Stellaluna by Janell Cannon
The Tub People by Pam Conrad
Sylvester and the Magic Pebble by William Steig
Miss Nelson Is Missing! by Harry Allard
Goodnight Moon by Margaret Wise Brown
Make Way for Ducklings by Robert McCloskey
Amanda Helps Becky Say Farewell by Patricia Goskowski Kubus
Eliza's Field of Faith by Rachelle Pace Castor
The Adventures of Isaiah James: Beach Boy by Sabrina K. Carpenter
Watch Over Our Water by Lisa Bullard & Xiao Xin