In 1991—back when MTV still played videos, the other Bush was president, and trading cards were actually considered cool collectors items—Yo! MTV Raps teamed up with ProSet MusicCards to make Yo! MTV Raps Trading Cards. Featuring some of the rap game's biggest stars at the time, the cards included everybody from KRS-One to Big Daddy Kane, Eric B. & Rakim, and yes—even MC Hammer and Vanilla Ice.