Egg Carton Critters has some cute ideas for your recycled egg cartons.
Here are some more links-
Egg Carton Animals
Egg Carton Animal Disguises
Crazy Crawlers
Egg Carton Lady Bugs (Lady Birds)
Egg Carton Crab
Egg Carton Snake
Egg Carton Allegator
Egg Carton Ant
Egg Carton Tulips
Egg Carton Flower Wreath
Egg Carton Daffodil
Egg Carton Flowers