This blog, ObSEUSSed has so many fantastic ideas. You can find food, crafts, activities, and more on this site. It is one of the best collections of Seuss stuff.
Here is some of the fun we did last year during daycare:
Green Eggs & Ham for lunch...of course!
We read several Dr. Seuss books and made a page for each book we read.The Foot Book feet painting
One Fish Two Fish Red Fish Blue Fish was glitter paint sponge painting.
Ten Apples Up On Top ...the kids took round apples and piled them up on top in order!
Paper plate food for Green Eggs & Ham.