Why do you throw beads at Mardi Gras?

The tradition of throwing beads during Mardi Gras parades dates back to the 1920s. Each parade is put on by a krewe, and the Rex krewe began the tradition of "throws" by tossing out inexpensive glass beads necklaces to entice the crowds. Catching the beads at Mardi Gras became an instant crowd pleaser.