1. Open the seams of the carton, lay the cardboard flat on the table, put coins on it, and draw darts around the coins with a pen.
2. Cut the darts along the drawing lines and use this as a template to draw outlines on other parts of the cardboard, and then cut out other darts cardboard with the same size.
3. Then take a dart board and stick a coin in the center with transparent tape to increase the weight.
4. Continue to cover another dart board. After alignment, fix the four corners with a stapler and wrap the coins in the middle.
5. Finally, draw any pattern on the dart for simple decoration, so that the dart is full of personality.