The feathers in the bubble ball are attached to the balloon and need to be inflated. According to relevant information. Putting feathers in balloons is actually very simple. Bobo balls are full of air. This only needs to be done in an uninflated polo. A little air. Then put the feathers directly into the balloon. Keep inflating the ball. Another method is to fill the wave ball with helium. At this time, it is necessary to consider the weight of the feathers put in. If it is too much and too heavy. Will cause the balloon to fail to fly. This must be calculated in advance.