Domino Rally
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Domino Rally was a toy product manufactured by Pressman Toys in the 1980s and early 1990s. Varying sets were produced, each set consisting of several hundred multicolored plastic dominoes (sans dots) and a few mechanical devices which could be triggered by falling dominoes. The idea was to set up runs of dominoes and enjoy watching them fall; several sets could be combined to make large displays.
The dominoes that came with Domino Rally sets suffered from some deficiencies that made them frustrating to set up (particularly for children). They were not solid rectangular prisms but rather were hollowed out on one side. The injection molding process used to make them also tended to leave protrusions on the standing edge. The result was that they tended to fall over easily, particularly when setting them up on the stepped staircases and bridges that came with the set. To counter this, the sets included tracks of snap-in dominoes that only fell in one direction. Later sets also included a small wheeled car that would drop dominoes automatically as it moved. This car was dubbed the "Domino Dealer," and was also sold separately.