The spherical bowl-shaped body contains a mechanism for its movement in a predetermined direction such as straight forward or to the side pref. along a base surface, the mechanism being controlled from a control unit by radio. The mechanism has an axle system comprising two axles, where the one is drivable by the mechanism, which also contains means for centre of gravity displacement of the body. The other axle is merely a locating axle. The axle system has two free axle ends which work in conjunction with two diametrical points on the inner cover surface of the body. The drive axle is in drive connection with the cover surface and the locating axle is movably located in the cover surface.
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