Streams (a.k.a. 20 Express) consists of pens, score sheets, and a deck of forty cards (or bakelite tiles, depending on the edition); the tiles are numbered 1-30, with two copies of #11-19 and one wild. Game play is similar to Bingo in that someone draws a tile and everyone must then write that number on her scoring sheet. 

Watch this quick video to learn how to play!