This is a completed version of the first tutorial in the documentation. As an end-user, you can build demos like this pretty easily.
Move any of the ball magnets and they will try to rearrange themselves to minimize their total energy.
The documentation walks you through the process of building each of the tutorials and includes assets (graphics and GameObjects) for all of the demos.
 |
 |
 |
 |
| Tabletop Experiments | Van de Graaff Demo | Ball magnets | Sun and Earth |
 |
 |
 |
 |
 |
| Flying Wrenches | Hovering Magnet | Beam through Solenoid | Geomagnetism | Antimatter in a Penning Trap |