1. Take a small piece of cardboard and fold it in half three times. Open the paper jam, and then fold it in half three times. Open the cardboard and fold it diagonally.

2. Fold according to the other diagonal. Open the cardboard and fold a small part of the four corners inward into a small square. Open the cardboard and fold one corner outward into a smaller square.

3. Fold the four corners into a square in another state. Turn the four corners of the square over and fold it to the bottom. Fold into a cross.

4. Inflate origami into a small ball. Put a number of small balls with the same folding method together. The assembled balls can be spliced together again.

The advantages of doing manual work:

1. Manual activities are a way for us to explore knowledge and promote brain development. The more we do, the more we can learn.

2. Handwork can bring fine movements to children, that is, the unity and coordination of thinking consciousness and muscles. From rough manual to fine manual, children's hands-on ability can be improved step by step, and children can control their movements more accurately by doing manual work.

3. Not only physiological function, but also physical activity is more important to people's comprehensive ability and mental health. Manual activities can cultivate children's observation ability, creativity and imagination. Children will gradually develop the habit of carefully observing things around them in the process of hands-on, and grasp the characteristics of things more and more accurately.