Cait requested a cake along the lines of John's epic sprinkle groom's cake, the leftovers of which ended up living at her house after the wedding. As I still have sprinkles leftover from that whole undertaking, I was happy to oblige.
This is what I ended up with! I forgot until the cake was already on the board that rolling a sprinkle cake requires a board the same size as the cake (in this case, a 6" board--this is on an 8") so I improvised and ended up with something still happy and colorful, with sprinkles inside and out. The green things are Sixlets and the little colorful dots in the piped spots around the side of the cake are individual sprinkles stabbed in there. The inside is funfetti cake with a healthy layer of vanilla frosting and sprinkles between the layers. Happy Birthday, Cait!
edit: Cait is a much better photographer than I am and took some pictures of the cake on their lovely picnic table. Here it is, looking much nicer:
I like this picnic table's style.