Choose a soft, fresh piece of chewing gum
Chew the gum until it becomes smooth and pliable
Flatten the gum with your tongue against the roof of your mouth
Form the gum into a thin sheet
Trap a small pocket of air inside the gum with your tongue
Gently push the air outward with your tongue and lips
Keep your lips sealed around the gum
Blow a small, steady puff of air into the gum
Expand the bubble slowly
Stop blowing once the bubble reaches the desired size
Close your lips to keep the bubble from popping
Practice with small bubbles before trying larger ones