First,you need to be at the bottom of a swimming, pool with your face facing the sky.(Hold on to something in case you float up).Than you can allow a sudden burst of air to pop out of your mouth.(you can also try saying:"pop",
"poo,"or "plop" underwater.)A bubble ring will pop out of your mouth.For the first hour of training you may get 98% broken up bubbles.By two days of training,making it is simple.pictures below: