Marble (toy) Required" and "The Colbert Report". Currently, the world's largest manufacturer of playing marbles is Vacor de Mexico. The company makes 90 percent of the world’s marbles. Over 12 million are produced daily. Marbles are also made in China and may contain lead, arsenic, and/or cadmium due to the manufacturing process of old glass. Art marbles are high-quality collectible marbles arising out of the art glass movement. They are sometimes referred to as contemporary glass marbles to differentiate them from collectible antique marbles, and are spherical works of art glass. Collectible contemporary marbles are made mostly in the United States by
Lose Your Marbles board. In addition, a match of five will send marbles to the opposing player's board. The game in hard mode has a tactic after the player wins 6 games to change its skill and win every single other game. This cause the player to literally lose their marbles. Due to its simplistic controls, "Lose Your Marbles" can be played with two players with one keyboard. Lose Your Marbles also features a LAN multiplayer mode to connect 2 players over a local network. SEGA boldly claimed "More addictive than Tetris or your money back!" This was not a gimmick - SegaSoft