1. First, pull the balloon skin in all directions to loosen the rubber skin. If you pull the balloon skin by hand in advance, you will save effort when you blow it later. Don't pull the balloon skin too tightly, or it will burst easily when it is blown in the future. Drag back and forth several times to achieve the effect.

2. Grab the mouth of the balloon. Grasp the balloon mouth at 1/4 with index finger and thumb, with index finger on top and thumb on bottom.

Take a deep breath, and then block the balloon with your mouth.

4. Blow the air from the lungs into the balloon. This is actually the same as bulging cheeks, except that this time the air in the cheeks should be filled into the balloon to relax the cheeks.

5. after the balloon is formed, it should be blown up a little. If you can't blow at once, you can stick your mouth up and take a breath before blowing.

6. If you need to rest during blowing, press the balloon mouth with your index finger and thumb.

7, tie the mouth. When the balloon has been blown big enough, you can cock your mouth.