First, prepare some rectangular pieces of paper, just feel the right size. Then fold a piece of paper in the middle, draw a suitable square area, and cut it along both sides, but be careful not to cut it through, just cut it on both sides. Open this paper, draw your favorite border on it, then draw your own patterns and words on another paper, color them, and then cut them along the border and cut them one by one.

Then stick these patterns in the right place with thick double-sided tape. The double-sided adhesive should be thicker, so that it won't stick to the paper, and it looks three-dimensional and better. Then decorate the blank again to make the greeting card more beautiful. You can also find a bigger cardboard, choose your favorite color and stick it outside as the background. A three-dimensional greeting card is ready.