Cat in the hat theme.
Dr. Seuss cat in hat
Modern and simple, easy to do and lots of DIY.
I got a lot of the items off of etsy or made myself.
The letters above his crib came from etsy seller: Snicklefritzs
The bedding sheet was from the Dr.Seuss collection on www.Potterybarnkids.com.
Bookshelf was A DIY off a tutorial online. Basically hinge the back and add shelf's.
The Frames on the wall came from www.theOrganicbloom.com.
The quote was off Ebay just search dr.seuss quotes.
The light switch came from Etsy seller: thefunkymonkey1
The wreath, I made from ribbons tied to a Styrofoam wreath you can get at any local craft store and then glued a wooden letter to the base.
The knobs for the dresser came from etsy seller: PATRINASPLACE
The chalkboard is just paint from a local hardware store and we painted a frame around it.
The crib came from Buy Buy Baby.
The Crib Quilt came from an etsy seller: SewMuch4me2do.
And the closet is the second priciest item which we had a local handyman install for about 200. You can get same look pretty cheap from home depo or any hardware store if you don't mind installing it.
I think the closet or the bookshelf I made out of an old door.
Just look everywhere for things that can fit into your nursery or room and take others ideas and put a twist on it so it becomes your own.