My school has a big Dr. Seuss celebration each year to go along with Read Across America. I hope the sites below are useful to your school too.
How else could I start, but by taking you to Seussville?
http://www.seussville.com/
This is the site for Dr. Seuss National Monument in Springfield, Massachusetts. Don't forget to go to the bio page.
http://www.catinthehat.org/
This isn't a virtual field trip, but I love Dr. Seuss quotes. This link is FULL of Dr. Seuss quotes that are great to make kids and adults alike dream, think and challenge themselves.
http://thinkexist.com/quotes/dr._seuss/
