1. Take a piece of paper, then draw four straight lines with a ruler, and then cut along the straight lines.

2. Cut a short section, then make it into a square with four corners, and then fold a small corner and stick it on.

Then write happy birthday on the paper just now, draw a cake, color it and cut it out.

4. Then find a new piece of paper and stick the square where you like, and then stick happy birthday and cake with glue or double-sided tape.

5. Then do some decorations you like on the greeting card, and the greeting card is finished!