Jamin has a some great links for a Dr. Suess Day here. She has a TON of other homeschooling links and ideas on her blog, so take some time to look around.
Cullen has a TON of youtube videos, everything from felt stories to product reviews.
Preschool Sunday School central has Bible based printables and ideas.
Carisa and One Little, Two Little have some great ideas for "Tot" books.
The very lovable, Curious George
You must check out Christian Preschool Printables.