Currently about the only kind of objects that you might do this with would be things like boxes or anything else that is stationary, but can be destroyed. In which case you would simply place say a key or reward item at the same position (inside and hidden)as your object to be destroyed.
We have a problem with anything else in that one object cannot be hidden inside or attached to another and move along with it in any kind of real sense at all as far as I know and trying to achieve such would be very difficult no doubt. I will leave it to others more knowledgeable I think.
The request for an attach to object command would overcome this if ever TGC impliment it.
