| 摘要 |
A toy system including a housing, an ultraviolet light source provided in the housing; and a representative element comprising photochromatic material, the representative element being temporarily disposed in the housing, the representative element being exposed to the ultraviolet light source while in the housing, the representative element having a first state in which a first condition is visually simulated and a second state in which a second condition is visually simulated, the first and second visually simulated conditions being different from one another. One of the first and second states is achieved in response to the representative element having been within the housing and exposed to the ultraviolet light source, whereby a corresponding one of the first and second conditions is simulated by the representative element having been within the housing. In one embodiment, the toy system may include a toy railway including a car which transports the representative element; the housing may be representative of a bottling plant and the representative element may represent a container such as a bottle, the visually simulated conditions being that the bottle is full or empty.
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