Make two rough semicircles from the cardboard to place inside the toes of your shoes. This gives a firmer base to print onto. Also stick some tape around the rubber edge and remove any shoe laces.
Choose a variety of buttons in different shapes and sizes. The buttons that work best are ones that have a very flat side and no indentations or ridges. If they are shiny, give them a light rub with sandpaper on the flat side to help the ink adhere better. Mix up a gray ink on the glass plate and roll it out to a fine consistency. The best way to get firm and even pressure on the button is to stick it directly to your index finger using double-sided tape.
Roll out some orange ink and print a few buttons to add color. Leave to dry overnight.
Excerpted with permission from <a href="http://www.amazon.com/gp/product/1438005962/ref=aslitl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1438005962&linkCode=as2&tag=craftfocom-20&linkId=VAWTVC65KCCHU4PD">Fresh Prints: 25 Easy and Enticing Printing Projects to Make at Home (Simple Makes)</a>.