zero-gravity executive desk toys

What sorts of executive desk toys can one expect when offices move into space?

Clearly, the little gizmo with the balls on wires would need to be changed, as would those pendulum-sorts of things that swing indefinitely because of magnets in the base.

One of the first concerns is containment- though it would be neat to simply bounce a superball around the walls of your office, it would also be somewhat difficult to clean up afterwards. A possibility is to set up air currents in an area so that small objects in that area dance around; however, if the objects were to escape, it could again prove difficult to retrieve them.

A second concern is noise- since, in all likelihood, the walls, floor, and ceiling of the office would have other offices on the other side of them, we can't have things hitting the walls too hard.

Perhaps the easiest to imagine are the simplest; a ball in a transparent box would bounce around nicely, and a container of water would have similar interesting properties, but do they look sufficiently executive?

An interesting one is to fasten two magnets to strings on opposite walls, so that two magnets, attracting each other, would hang, strings taut, in the middle of the room, perhaps an inch or two apart. The problem is again containment- if the walls are magnetic and the magnets get loose, or if simply the magnets get loose, it could create a minor mess. Moreover, I have no idea what the physics of it would be- how would it move?

Any other suggestions?