How can i make a star shaped pastry bag?

I want to make a churro. Some people say that if you wanted to make a frosting design, snip off a corner of a bag. But i want it to be star shaped or like. What should I do?How can i make a star shaped pastry bag?you can get the tips for your pastry bag , don't cut itHow can i make a star shaped pastry bag?You need to use a piping tip - they come in a set of 5 or so in most grocery stores by the frosting and baked goods for about $2 then you snip the tip off a gallon size bag drop in the tip secure with the ring fill with batter then make your churros. Your second option is a Cookie press it is a plastic or metal tube with several different dies for making shaped cookies and even decorations for cakes they are easily available at most department stores like Target or Walmart. Good Luck!