Rags to Ribbon
Ribbon and fabric are easy to use on flip flops. Cut or rip ½-inch strips of fabric 2 to 3 inches in length. Use the same or different patterns. Tie a fabric strip over the strap, starting at the left side, with a double knot. The tails of the knot should face upward. Keep knotting fabric strips until you reach the center thong. Skip over the thong and start again on the other side, finishing at the right side of the flip flop. .
A simple option, using patterned ribbon, is to cut two pieces the length of the straps and glue them on. Make a bow out of a separate piece of ribbon and glue it on top of the center thong. You can also wrap the ribbon around the straps, starting at one end and working your way to the other end, gluing as you go.