Do you blow smoke rings?

Fairly easy for me, a favorite uncle of mine who taught me how to smoke cigars, pipes, and chew tobacco at the age of 14, (me not him). It's just a combination of the "O" and the tongue for me. To impress the kids when they are outside blowing bubbles, I'll take a good draw and put the smoke in the bubble and watch it puff out when the bubble bursts.