I happened upon this blogger who hosted a Dr.Seuss theme Baby Shower and was so impressed. One of the comments I read was something like Martha had better watch out.
I have to agree she did a wonderful job! Just check out some of her pictures:

Take a wander over to her site Newly Nesting to see more great ideas. She has a few other posts about the shower here and here.
Her whole site is fantastic!
Another great site for ideas and inspiration is StemParties
Just look at these photographs:

There is really no end to where you could go with this theme.
If children will be attending and you are having an adult keep them entertained. You could have someone read them Bartholomew and the Oobleck. Make ahead or have them make their own Oobleck to take home! Or just a small bit to pass around while the story is being read. For instructions go here.

I just love the ideas you can go with. Even though this one I found at Everyday Celebrating is a birthday party. Same thing applies. FUN!
CORRECTION UPDATE: Even though I found this post at Everyday Celebrating. The actual creation and idea is Natalie’s from Little Shindigs.
She let me know about it the other day and I feel pretty bad about her not getting credit where it is due. I went to her site, and find that she is a Children’s Event Organizer “dedicated to inspiring fabulous Children’s parties.” If you are planning a party make sure to stop by her site, It is awesome! Talk about inspiration!

Go crazy with your cake. With Dr.Seuss there can be no mistakes! This person knows how to make a cake! Check it out.:

Check out this diaper cake from L.A. Babycakes site:

Some great Dr. Seuss inspired recipes can be found here.

How about serving Pink Yink Ink Drinks? (You can add alcohol or not) Recipe found here.

Oh, and what about jello-shooters?
You could make Truffle trees from the fluffy garlands found at dollar stores (Just cut them up in pieces) and glue bits on the end of a pipe cleaner or chenille stem.

For more great ideas:
Getting Silly With a Dr.Seuss Party
Printable Dr. Seuss Gift Tags
Clip Art
More Clip Art
What could be more zany than a baby bath tub punch bowl? Add fish?
A list of Dr. Seuss books from Amazon.com. Great to add for decorations and better yet, the new parents have an instant library for baby!
If anyone has any other Dr. Seuss ideas, feel free to share!