test comment (sorry!)

I think overly patterned bedding may clash with the rug. Maybe go for a basic quilted slate blue or tan bedding: http://www.roomandboard.com/rnb/product/detail.do?productGroup=19595&catalog=room&category=rm_kids&subcategory=kid_bedd_coll

And use this car pillow to add punch:
http://www.kohls.com/upgrade/webstore/product_page.jsp?PRODUCT%3C%3Eprd_id=845524892548398&pfx=pfx_shopcompare&cid=shopping3&mr:trackingCode=56192726-B8E1-DE11-974B-0019B9C043EB&mr:referralID=NA

I think these are really cute and have been eyeing them for my son's (also a car lover) room:
http://www.wisteria.com/Derby-Critters-Forest/productinfo/W1965/

The Mod Spa collection from Javis Davis would be a good starting point for bedding. It has your colors and a clean, modern look.

http://tinyurl.com/y8aj6h5

Oh sorry! I missed the part about it being for a 3 year old! Javis Davis does kid's bedding too...

Have you looked at Restoration Hardware's Baby and Child line? They have a lot of nice looking stuff in that color palette.

http://www.rhbabyandchild.com/

Hi there, I know it might be an obvious place to start... but DwellStudio.com has a great line called "Transportation" - It has your color scheme with added green, orange and gray. Perfect to add a little more fun to the mix! There are several items including a throw pillow, a tabletop bookshelf, bath accessories like shower curtains and area rugs - also backpacks, art aprons and lunch boxes as well. Recently Dwell updated their lines for Target.com expanding on the toddler room - they have a collection there named "Traffic" which is a spin off of the original collection as mentioned before. You could easily mix the two along with adding an Alphabet poster/print and a Counting poster/print as ART. Check etsy.com for a million options. ALSO, if you are looking for a child size table, for a desk or activity table, the LACK side table from Ikea.com is now only 7.99 and comes in white, pale blue and a dark chocolate wood grain. Using white accessories in your room will really stand out - especially if you are doing accent paint! GOOD luck! :)

Here's some ideas:

http://www.geniusjones.com/product-exec/category_id/219/product_id/6645/nm/Wall_Art_Traffic

http://www.geniusjones.com/product-exec/category_id/103/product_id/6712/nm/Icon_Blanket_Cars_Chocolate

http://www.landofnod.com/family.aspx?c=107&f=4669

PBTeen:
http://www.pbteen.com/products/bubble-sheet-set/?pkey=cgirls-sheets-sets

http://www.pbteen.com/products/interlocking-circles-organic-sheet-set/?pkey=cgirls-sheets-sets

http://www.pbteen.com/products/retro-rings-organic-sheet-set/?pkey=cguys-sheets-sets

Dwell Studio
http://dwellshop.com/b2c/ecom/ecomEnduser/items/3-S1-lV1DWELLKIDS-lV2bed%20time-lV3DUVET%20SETK.aspx

The DwellStudio line at Target has a > transportation-themed kids bedding set in khaki with blue, brown and orange. . .

Or else their DwellStudio circles set is always nice!

Avalisa has great artwork in a variety of colors and themes (including transportation):
http://www.avalisa.com/productlines.aspx?id=3

NotNeutral also has some really great transportation accessories (wall decals and pillows) and a nice brown/blue "links" reversible quilt -- best price here.

numsi has some animal wall art which would work well color-wise- maybe one of the kudus, the pale blue giraffe or one of the buffalo's...
http://www.numsi.com/collections/animals

Name Your Design has great kids artwork that you can customize. I just ordered 2 for my twins nursery. I've attached a link to a great car design.

http://www.nameyourdesign.com/24-x-18-canvas--zoooom--g2418.html

For artwork I agree with "scnappycat" and search Avalisa. However, you can also purchase Avalisa artwork from art.com (just search "avalisa" in the search bar) There are 10 pages worth of very modern artwork and in different sizes!! She does a ton of browns and blues!

Oops! I was wrong, there's 30 pages of choices from Art.com! Take a look at these larger ones:

this one- http://www.art.com/products/p15354641-sa-i3720511/avalisa-blue-cars.htm?sorig=cat&sorigid=0&dimvals=0&ui=19daa76710e94650a12775bca710746b&searchstring=avalisa

or this one- http://www.art.com/products/p15354635-sa-i3720505/avalisa-blue-auto.htm?sorig=cat&sorigid=0&dimvals=0&ui=19daa76710e94650a12775bca710746b&searchstring=avalisa

We have lots of adorable personalized transportation wall decals for children's spaces. I'm the owner/designer of http://www.graphicspaces.com

Checkout our Etsy shop in this category: http://www.etsy.com/shop/graphicspaces?section_id=6125169

He might just love our Monster Truck, Airplanes or Tractor with his name on it! Hope this helps gives you some creative ideas and inspiration!

Try Javis Davis for bedding! javisdavis.com

Hi Carrie,
I see someone already suggested my site www.nameyourdesign.com (thanks Susiesmom).

I have an adorable modern car print and I am able to change the colors to coordinate with your son's room at no extra charge. Just put your requests into the comments section during checkout. I also have some coupons out there...one that comes to mind is PJN15 for 15% off.

check it out here:
http://www.nameyourdesign.com/16-x-16-canvas--zoooom-1616.html

Good luck with everything! I love the rug.
Stacy