Cars Pull-Apart Cupcake Cake

I made this Cars pull-apart cupcake cake for my oldest son's birthday this summer.  It was actually pretty simple to make.  I put a small amount of frosting on the bottom of each cupcake (so they would stick to the cake board) and pushed them close together to make this S shaped road.  My son's name starts with an S.  I colored some frosting black and frosted the cupcakes together as if they were a cake.  I then cut large flat shaped marshmallows into smaller pieces and painted them yellow with food coloring spray to make the markings on the road.  I used small white sprinkles to look like gravel along the side of the road.  To make this an authentic Cars cake, I raided the toy box for Lightening McQueen and Tow Mater, gave them a bath in the dishwasher and then placed them on the cake.  

The hardest part was keeping the kids out of the cake at the party.  They wanted to drive the cars on the cake.