One, the hollow card, used in the "card paper" , the thickness is relatively large, suitable for making cards. It can be white or it can be colored. "Carving Knife" , this is relatively simple, Oh, you can draw a pattern, want to hollow out the place to make a mark, such as all black, and then find an old book or newspaper, carefully carved, knife must be sharp, do not appear raw edge. Two, hand-painted cards, the painting requirements are higher, need to use colored lead, or markers, or crayons. Fold the cardboard in half and paint on the folded side. Just go online and pick out the pictures and draw them yourself. Third, the paper card, you can go to the stationery store to buy the paper paper, or simply cut the paper with a knife 5mm-10mm, with a toothpick or a smaller bamboo needle, the cross-sectional area of the paper, clamping the end of the paper, to make you want to shape, then glue it to a piece of cardboard.