This origami hot air balloon is relatively complicated. It is recommended to use larger paper for the first time and the toughness of the paper is also required. Since the production is cumbersome, I only provide illustrations.
You can use a piece of 25*25cm square paper to make a 15cm high hot air balloon. You can choose paper with one side white and one side colored. This has higher requirements on paper. Choose one with better toughness and plasticity. It would be better to make it out of paper
1. Turn the white side up and fold it as shown in the picture
2. Fold the lower part upward
3. After getting the model in the picture, open it completely
4. Fold the upper part as shown in the picture, and then open it
5. Divide into 16 parts and fold them into valley marks