A to Z Teacher Stuff -Themes
Need help building a unit? These themes feature quality links to thematic units & lesson plans, resource pages, book activities, books, and professional resources organized by theme.
http://www.atozteacherstuff.com/themes/

The Activity Idea Place: An Early Childhood Educator's Resource
Has over 2400 activity ideas for early childhood educators. The ideas are centered around general themes, seasonal and holiday themes, and themes by the month. It also contains a chat forum with several thread
http://www.123child.com/act/

Hummingbird Educational Resources
Contains a lot of theme based lesson plans.
http://www.hummingbirded.com/llp.html

The Official Eric Carle Website
Check out the Caterpillar Exchange. A number of teachers, parents, librarians, booksellers and children talk about the projects they've done using Eric Carle's books as the focus or as the starting point
http://www.eric-carle.com/

Teaching Ideas for Early Childhood Special Educators
Special ed teachers in the Montgomery County Public Schools share their activities.
http://www.mcps.k12.md.us/curriculum/pep/teach.htm

Theme Links for Early Childhood Educators
Scroll through the list of links, pick the theme that you like, and then link directly to the activity.
http://hometown.aol.com/iteach345/