| 摘要 |
A modular bowl-shaped toy, preferably having straight or convexly flared sidewalls, with a ball for rolling circularly around the inside of the bowl module to simulate an orbiting spacecraft. The bowel module has an upward and inwardly turned rim forming a circumferential channel and, preferably, a substantially tangential passageway leading therefrom so that at high circumferential velocities the ball can enter the channel and escape from orbit through the passageway. Additional bowl modules of similar design can be connected by conduits to simulate both orbital and interplanetary space travel. A spring-biased launching device in the bottom of the bowl module may be used to propel the ball into a circular path around the inside of the bowl, and a movable barrier selectively prevents the ball from entering the tangential passageway.
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