Meet the Hoberman Mini Sphere Orbiter: a neat expanding toy with a motorized base that reacts to blacklight as it spins. It expands and closes on the base to create kaleidoscopic spirals.
More gadgets like this: here
Hoberman Motorized Mini Sphere Orbiter -- Gadgetify
This toy turns to a contracted state thanks to gravity as the mechanism winds down. It can be easily disassembled for easy storage.
[HT]
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