I would like to animate 500 or so shards to be "animated" rigid body at frame zero and "dynamic" at frame 550. Do I really have to set a keyframe for each individual object or is there a way to animate that rigid body property as a group? The shards are in a group, but it appears that the rigid body for a group of objects can only be set, not animated. I've tried using an empty parent object to no avail.