I found my inspiration for this Transportation Birthday Cake on this website. It was car #16, so thank you for the great idea!! I just added a variety of vehicles because our theme encompassed more than just cars.
I used Wilton cookie cutters for the vehicles on the sides of the cake. I added my own details with fondant and I used a paintbrush and water for the indentions. I used the marshmallow fondant recipe at www.whatscookingamerica.net/PegW/Fondant.htm and the buttercream recipe from the same site.
All of the vehicles are different all away around the cake. On top, I used an oval cake pan with two cupcakes stacked on top. After some “sculpting” of cake, I used buttercream icing to make it look like a car. I also used Oreos for the wheels. I added a bit of buttercream for hubcaps. The windows and bumpers were made out of leftover fondant. It was a lot of fun to make!