Take some cake and crumble it into frosting. Find a good consistency. Roll the mixture into bite-sized balls. (This part gets messy. It's fun.) If you want them chocolate-covered, put into the freezer for a bit, and take them out later to dip them in melted chocolate and freeze them again. If you want them sprinkles-covered, roll them in a bowl of sprinkles and then put them in the freezer.
Last night's were fun-fetti with strawberry frosting and sprinkles. I'm eager to try this with red velvet cake, vanilla bean cream cheese frosting and chocolate. Yum!