I did the colors, but no way am I cutting them out into stars and putting them on sticks, because that would mean a pan of several dozen bars would be reduced to 12!
Not that eating the leftoverparts in between the stars wouldn't be just as yummy, but still.
Kellogg's actually has a giant list of variations on the standard Rice Krispie treats. Banana nut, butterscotch, cherry coconut, chocolate pumpkin ... the list goes on. How much fun would it be to work in their test kitchen?