A bean bag is a small bag filled with dry, compressed beans. They can also be made from PVC pellets, expanded polystyrene, or fake fur. They are usually used for throwing games, but they have a lot of other uses. Piero Gatti invented the beanbag in 1969 and it became a popular item for home use. The original beanbag chair was called a “Sacco,” a pear-shaped leather bag filled with inflated beans.