We've all seen them in episodes of High Stakes Poker and Poker After Dark: the bundles of real cash the high stakes players use in stead of high denomination chips. These bundles are often called "Bricks" amongst players. We now have these "bricks" of fake cash (play money) to resemble the real Euro notes as much as possible.
Because of their design, they look a lot like real Euro notes without being illegal to use. They are sold per 50 bills with a nice, professional wrapper that lists the value of the brick.