Prepare a place in your refrigerator where 12 cups will fit. Place 12 plastic clear cups on a large baking sheet for easy transportation. Set aside.
Prepare berry blue Jello according to the package directions.
Transfer Jello to a cup with a spout or use a turkey baster to distribute Jello evenly among the 12 clear plastic cups.
Place cups in the refrigerator for 1 hour or until set to the touch.
Continue this process with the lime, lemon, orange, and cherry layers.
If you choose, top with whipped cream and sprinkles or a cherry before serving.
Notes
Cover each rainbow layered Jello cup tightly with plastic wrap and store for up to a week. Leave the whipped cream and cherry off until you plan to serve.I do not recommend freezing these jello cups!