The steps to fold a mini milk carton are as follows: 1. You need to prepare a square piece of colored paper, and you can choose the size according to your needs. Fold the colored paper in half horizontally, and then fold it in half lengthwise. When you open it, you can see a cross crease.

2. Fold the four corners of the colored paper toward the center point to form a small square. Then, fold the top edge of the square down to the center line and the bottom edge to the center line as well. Next, turn the entire paper over and repeat the above steps, folding the bottom.

3. Fold the colored paper in half along the center line, and then fold the edges on both sides inward to the center line. Then, fold the upper and lower corners outward to form the sides of the box. At this point, care needs to be taken to maintain the shape and symmetry of the box.

4. Fold the four corners of the box inward to form the bottom of the box. Then, use your fingers to gently open the bottom of the box so that it can stand upright. At this point, a cute mini milk carton is completed.

5. If you want to make a more exquisite mini milk box, you can use colored paper of different colors to match and combine, or add some decorations and patterns to the box.

Second use of milk cartons:

1. Making storage boxes: After washing the milk cartons, they can be transformed into storage boxes. You can cut off the top of the milk carton, punch holes in the bottom, and string it through to make a practical storage box. Can be used to store stationery, remote controls, cosmetics and other small items.

2. Make a lantern: Cut out some patterns on both sides of the milk carton, then punch holes in the top and string it through to make a simple small lantern. Can be used during festivals or birthdays to add a festive atmosphere.

3. Make flower pots: After washing the milk cartons, you can transform them into small flower pots. You can put a layer of soil on the bottom of the milk carton and then plant your favorite flowers and plants to make a simple small flower pot. It can be placed on desks, windowsills, etc. to increase indoor greening.

4. Make a tissue box: After washing the milk box, you can transform it into a tissue box. You can cut a slit in the top of the milk carton and place it on the bathroom sink for easy access to paper towels.

5. Make a card box: After washing the milk box, you can transform it into a card box. You can lay some cards on the inside of the milk carton and then put some small items into it to become a practical card box. Can be used to store membership cards, coupons and other card items.