Unfortunately there's not much out there for little boys when it comes to nurseries. All the bedding at the stores that I've found is either baby blue or boring neutral tan/green's. We wanted something bright and fun, and when I spotted a cat in the hat book I decided I wanted the nursery to be full of Dr. Seuss bright color's and characters :)
I would say it's a mix of modern, contemporary, and traditional.
We got our personalized Dr. Seuss bedding from Pottery Barn. The bumper, crib sheet and personalized blanket + shipping was $200 total. That was the biggest splurge we made for the room.
We purchased his crib for $120 since it was a store model from AAFES.
We bought the Dr. Suess Wall Art for $20 from MILLERSF on ebay.
The dresser organizers were only $10 from Ikea.
The accent wall is Red Gerranium from Glidden Paint in the matte form.
My favorite item would have to be the books we framed that are hanging on the wall. We went to a thrift store and found a bunch of old Dr. Seuss books and put them in painted frames :) The frames were $3 a piece and the books around $1.50 a piece. That's $22.50 total for all the frames and books :)
You can't go wrong with Dr. Seuss. Pick out a crazy Dr. Seuss color (yellow, blue, red) and paint an accent wall. Go on ebay and you'll find all kinds of lamp shades, wall art, picture frames, night lights, etc. You can get Dr. Seuss bedding from pottery barn or babies r us. If you want to go cheap, just buy the character sheet and find an inexpensive red bumper. There's so many ways you can go about it!Also, I would suggest only painting an accent wall if you plan on using a medium to dark color. The room we have gets quite a bit of light in it and just the one red wall made it significantly darker. I can't imagine painting all the walls red.