Barnaby's Boisterous Balloon

You blow up a balloon that is in fused with elemental magic. As an action you inflate the resin used in casting this cantrip consuming the resin. Upon casting this spell you choose a damage type from cold, fire, lightning, thunder, acid, or force. As an action on your turn you can choose to detonate one balloon, and all creatures within a 10 foot radius must succeed a Dexterity Saving Throw or take 1d6 damage per balloon, taking no damage on a successful save. If a balloon is hit by any form of damage it detonates.

This spell creates 1 additional balloon when you reach 5th level, 11th level, and 17th level.