| Categories | 
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| Mechanics | 
| Fluid Mechanics | 
| Oscillation and Waves | 
| Thermodynamics | 
| Electricity and Magnetism | 
| Optics | 
| Modern Physics | 
| Astronomy | 
| Images | 
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[Setup Time: 5 Min.] [Current Condition: Good]
Swivel is connected to a Hoberman Sphere mobile. Spin the mobile and pull the string. The sphere will spin faster when it collapses.
Hoberman Sphere by backwall
Demo Example:
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