This great free online game is similar Tetris but completely different at the same time.  It is like Tetris in the way you have to stack bricks, but unlike Tetris the point is to get them higher. Basically you start with 99 Bricks and you have to stack in in such a way that they stay standing. It is a fun and challenging way to waste some time while you are waiting for that load of laundry to dry.

Play 99 Bricks