Help I want to shake what I attached to the rod

[josemendez]

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Should I connect the spheres with obi particle attachments and make the type dynamic?

Exactly

The spheres moves violently and goes somewhere. 
[color=#333333][size=small][font=Tahoma, Verdana, Arial, sans-serif]Rigid body, obi rigid body, sphere collider, obi collider are set on the spheres.

Just make sure the end of the rod isn't set to collide with the sphere. This will result in a force-feedback loop, because collisions try to take the rod out of the sphere, but the attachment tries to get it back in. The solution is to use phases to filter out collisions between both.

This situation along with the solution is explained in the manual, read the last part of:
http://obi.virtualmethodstudio.com/tutor...aints.html

In your case, setting the ObiCollider phase to 1 (the default phase for particles) should do it.