bungee cord

I do not know about bungee cord and where to buy a bungee cord. It was the first time I heard about it. My husband is a handy man, but I never know if he has it. A few minutes ago while he was lying on our bed I asked him about it. He said yes he knows and actually he has some of it in his tool box. I asked him of how to sue it, he said to tie something. He could use it anywhere maybe when he have to tie something together. It is kind of elastic cord. Now I have a little bit of idea about it.