Eggs are a great entryway to talk about science with kids. They can understand what an egg is, and learn that other animals besides birds lay eggs. Here are some craft ideas for eggs: www.enchantedlearning.com/themes/eggs.shtml/

Bunting, Eve. HURRY! HURRY!
   The animals on the farm hurry to the barn to see an egg hatch.

Graham, Bob. DIMITY DUMPTY: THE STORY OF HUMPTY'S LITTLE SISTER.
   Too shy to be part of the family's daredevil circus act, Dimity figures out a way to contribute without being in the spotlight.

Heller, Ruth. CHICKENS AREN'T THE ONLY ONES.
   Vibrant illustrations depict other animals that lay eggs in this rhyming nonfiction book.

Imai, Miko. LITTLE LUMPTY.
   Little Lumpty's hero is Humpty Dumpty, but unfortunately Lumpty climbs up on a wall and is afraid to come down.

Seuss, Dr. GREEN EGGS AND HAM.
   This popular easy reader also works well as a storytime readaloud, where the children can chime in on the repeated phrase "I do not like green eggs and ham!"

Tafuri, Nancy. WHOSE CHICK ARE YOU?
   Several animals try to figure out who is the mother of the new hatchling.

Weeks, Sarah. TWO EGGS, PLEASE.
   The setting is a diner late at night, when various customers request "two eggs, please" fixed in a variety of ways.