"Haa-, haa, haaa, huff" and puffs of breath as a brush!
You may have to play with the settings a bit to get the correct bubble you want, but it's pretty easy to use! c:
(Haa-)
(Haa)
(Haaa)
(Huff)
"Haa-, haa, haaa, huff" and puffs of breath as a brush!