or the longest time, I simply hang those wide rubber bands from my grocery in the kitchen. From time to time, I use a couple of them on my pair of pier to hold things together for gluing.

The collection is now big enough to start making my own rubber band ball.

1. Start off with a solid core
   
2. Now time to turn it into a sphere
   
3. At this point, you can make it grow by simply adding more rubber bands.
4. ???
5. Profit!