Little M&M had a super successful birthday party! This year he chose Cars as his party theme. Check out the decorations, as well as what went on during party time! First, the invitation! I created this in Photoshop Elements. I took out his name, address and phone number but you can get a good idea of how it looked: On the way in party guests walked by our cars, which had been turned into Cars characters using poster board and crayons. We mostly use the side entrance to our house instead of…