Coin origami was very popular on the Internet a while ago. It is precisely because the charming handmade activity of origami is perfectly combined with the special material of banknotes that it has aroused the preference of people who love life. At the same time, banknotes are still readily available (provided you have them in your wallet), so using local materials is definitely a good idea. Today, let’s take a look at using a knife to make paper crafts.