Bubble-producing spell

The Bubble Charm is a charm which produces non-bursting bubbles from the tip of the wand. The colour of the bubbles can vary and can be controlled by the caster. The Bubble Charm is similiar to the Bubble Head Charm.

1991
Professor Flitwick used the charm to decorate the twelve Christmas trees at Hogwarts in the Christmas of 1991. The bubbles in this instance were golden

1992
Ronals Weasley's broken wand produced large bubbles in 1992, however, the wand was being attached with Spellotape and Ron did not say an incantation, so it is likely that it was just a malfunction of the wand rather than a spell.