Decide which Ninja Turtle you would like to make. Choose the appropriate color for his mask. Measure enough ribbon in the color of your choice to go around the ball. In case you need a reminder, here are the colors for each Turtle: Leonardo - Blue, Donatello - Purple, Raphael - Red, Michelangelo - Orange
Place a drop of glue under one end of the ribbon.
Wrap the ribbon around and place a few more dots of glue at the other end
Finish by overlaping a small portion of the ribbon and glueing to secure.
Glue some googley eyes on - the size and positioning is up to you.