Firm potato, black marker, knife, paint, paper.
Cut potato in half. Draw design onto one of the cut halves. Carefully cut the design into the potato and remove any excess potato so you are left with just the design. Carefully dip the potato stamp into paint and dab onto paper.
“Dab potato onto a scrap sheet of paper to remove excess paint.”
“Keep the peel on the potato to act as a grip.”