Okay I thought I had these on my blog and just told someone to go look at them and guess what? They were not there, they were on my facebook page though... so
here they are:
I totally cheated using Betty Crocker's white cake mix and then divided the mix into equal parts and colored the mix with bright food coloring. Then you simply layer them into the cupcake liner. I frosted them using Betty Crocker's Cream Cheese Frosting w/a lot of food coloring in them because I wanted that bright color for my little guys 5th bday. These were fairly easy but they did take a lot of dishes and a lot more time than I thought they would take.
For frosting I piped it on there with Tupperware's squishy accordion thingy. I don't know what it's called but basically it's to pipe frosting on. It worked okay, although you can tell when it was almost empty on the ones in the back it was hard to get a nice full frosting look. It works much better very full.