Gentle Floating/Tumbling Object Collisions and Interactivity

I’m trying to achieve an effect like this:
with my application, where the objects will gently float around unless clicked on, in which case the user could drag the items around, disturbing the rest, but then they settle back down into this gentle tumble.
I currently have a few spheres bouncing around, however they pick up speed and don’t fall into this gentle floating rhythm. PlayCanvas 3D HTML5 Game Engine
I’ve toyed around with the collision settings but am new to PlayCanvas and would appreciate any tips or direction to tutorials :slight_smile: