Select a short, thick rubber band, such as a band used to secure vegetables. Fold this rubber band in half, then in half again, then a third time if possible. Do not twist it; you should end up with a flat “stack” of rubber. While pinching the thick band flat, wrap a thinner rubber band around it. Twist the slack of the thinner band and wrap it over the thick one in the other direction. Continue to twist and wrap until there is no more slack in the thin band.
Start with the smallest bands first, since they won’t be useful once your ball passes a certain size.
Get it to the size of a tennis ball for the best bounce.
Ask friends and neighbors for spares. Ask postal workers, newspaper delivery people, and other door-to-door delivery workers. Look in shoe stores, which may use rubber bands to hold the shoe boxes closed.
Once the ball is about the size of a basketball, wear safety goggles. Plenty of rubber bands will snap after this point, and you don’t want them hitting your eyes. [5] X Research source Rubber bands decay over time. To stop it shrinking or breaking apart, your project will need regular reinforcement. [6] X Research source
