Decorations for many of my Disney themed parties include gathering all the toys, stuffed animals, and books I can find with the movie characters. For our Cars party, that's exactly what I did! I found all the Cars characters we had between the boys and used them on the tables and across the mantle. Big E has a Cars area rug in his room, so we incorporated that as well. Prior to the party, I found several metal Cars/ Radiator Springs signs at Hobby Lobby and used those too.
On the food table, I used a simple black plastic table cloth as the "road" and using yellow duct tape, I made stripes across the middle (even though you can't really see the stripes in this picture due to cones and platters!). I also had several Cars bumper stickers that I stuck on the table for extra flair! I found checked racing flags on sale and used those with orange cones we already had as a simple centerpiece. Lightening McQueen waited patiently between the cones! :)
Using My Memories Suite (use STMMMS33078 for a $10 discount) I created all the food tents and the "Happy Birthday" pennant across the window.
You can easily use red, white and black balloons along with traditional streamers to add extra excitement to the decorations.