Rummikub is one of the most straight-forward but challenging renditions of the Rummy game. Rummikub added a fresh twist to the traditional world of Rummy games by introducing the concept of tiles for the first time. The players no longer need cards when they play Rummikub. The cards, including the jokers, have been replaced by coloured wooden or plastic tiles. The entertainment factor in Rummikub helped it make the smooth transition to the worldwide web.