Why can't balloons be round?

Because the ball cover is thicker in summer, slightly smaller in spring and summer, and round, it is not suitable for this season of summer. Some are round after pulling. If it is not rounded after pulling, it is easy to round it by soaking it in hot water.

Internet celebrity bobballs are ordered irregularly. Here's a little trick to make the bobo ball more round. I remember the first time I made this, I just blew it with a balloon blower, and it turned out to be oval and even had a pointed head. Later, it was found that the edge of the bobo ball was pulled before blowing, and then it would be very round. You can also blow out the air first, then let it out and then blow it. Repeat this several times and the finished product will be big and round.