In a large mixin' bowl, combine the Funfetti cake mix, Cool Whip, and vanilla yogurt. Give it a good stir with a wooden spoon until everything's mixed together real nice.
Cover that bowl up with some plastic wrap or cling wrap, and pop it in the fridge for at least an hour to let the flavors meld.
When you're ready to serve, toss in some of those pretty sprinkles and dish it up with some animal crackers. Don't forget to store any leftovers in an airtight container in the fridge. Enjoy, y'all!