becuz if they werent they wouldn't be any fun and you cant hurt people with them or make funny shapes like a horse and they turn different colors when you stretch them to much:)
Rubber bands are made of rubber because rubber is stretchy so it is able to wrap around materials such papers, pencils, poster boards, etc. Also, it is a strong material so it usually does not break.
They collect latex from the rubber tree by tapping it and let it drip into a bucket and wait till it stops. It is then processed and various chemicals added, predominately sulphur to allow it to be...