You can follow the following steps to make a business card for Grandpa Andersen:

1. Prepare a piece of paper the size of a business card, preferably in a bright color or his favorite color.

2. You can put a photo of Grandpa Andersen on one-third of the business card. If you can't find a suitable photo, you can use his portrait instead.

3. In the remaining space, write a brief introduction about him. For example, "Grandpa Andersen, born in Denmark, is a famous writer and poet. His representative works include "The Ugly Duckling", "The Daughter of the Sea", etc."

4. You can choose to draw in the free space of the business card Some simple drawings are used as decoration, such as characters in his works or some scenes in his life. You can also choose to decorate it with some of his quotes or his iconic images.

After the production is completed, you can display and share it as needed.