| 摘要 |
Each of first vehicles has an individual address dependent upon an insertion of a selective one of different keys into a socket in the vehicle. Each of the first vehicles is movable in any desired direction on a first support structure formed by intercoupling male detents on first beams and female detents on other beams, all of them having the same construction, and by intercoupling the male detents on the beams to female detents on blocks, all having an identical construction. The first support structure may be, but does not have to be, intercoupled with a second support structure formed by intercoupling beams and blocks of the same type as the b3eams and blocks in the first structure. The second structure defines a track on which an additional vehicle (e.g., monorail) addressable in the same manner as the first vehicles is movable in first and second opposite directions.
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