Soft bean bags to flip, lift, catch and pass. I have an almost mint condition bean bag given to me by Chris Cross; a hacky sack. It came in its own sack bag with an instruction manual – sack book.
In the early nineties, Herb Miller led a product development project code named Silver Bullet. The team started collecting pairs of words where the first started with an S and the second with a B. This website is the continuation of that part of the project. Nowadays other projects display alternatives to their official acronyms on their websites.