Gather all ingredients and ensure they are chilled before beginning.
In a large punch bowl, pour the grape soda and lemonade. Add club soda if desired and stir gently to combine.
Taste the mixture and adjust sweetness if needed by adding more lemonade or fruit juice.
Add large scoops of rainbow sherbet into the punch bowl and let it melt slightly for a swirled effect.
Top with colorful sprinkles for a fun, festive appearance.
Serve immediately in cups using a ladle, ensuring each serving includes some sherbet.
Store any leftovers in the refrigerator for up to 2 days. The fizz may lessen but flavor remains delightful.
Notes
Keep all ingredients chilled for best results. Avoid adding ice as it dilutes the flavor. For adults, you can add a splash of vodka or rum for a boozy version.