Awesome Phineas and Ferb Cake!

My son's favorite show is "Phineas and Ferb" so I designed this cake for him. I used cups with electronic lights in them to hold the dry ice. Dr. Doofensmirt's evil "Luminator" is just a mini luma disc on top of a car made of fondant and rice crispy treats. The roller coaster in the background is also made of fondant covered rice crispy treats. The tree, the fence, and the grass are all fondant as well. The cake was half rainbow white cake and half oreo cookie cake. Even though my boy didn't do so well with the "Happy Birthday" song, he had a great day and if you listen close, you can hear him say, "That sure is a cool looking cake."