These ideas are stolen from happy wheels:
Sleeping object: A non-static object that is static until it is touched, interacts with something or triggered.
Disappearing: A object dissapears ofter a certain trigger action.
Trigger: A 3d object that gets connected to a sleeping- or disappearing object (and so on) via options in the modmaker. The trigger activates by being compact and being touched, or if its not compact that something is in it. But otherwise it behaves lile normal static or non-static objects.