Cool Homemade Mario Kart Cake

I am a mother of 5 (ages 7, 6, 5, 4 and 5 months) so combining birthday parties is financially a must for us!! My two boys decided on a Super Mario Kart Birthday Theme, so with that, I came up with a cake that is actually two separate cakes, so they both have their own cakes!

I have never seen my boys soo happy as when they saw their cake for the first time!