In Yngol Barrow, the player is greeted by a glowing blue ball that followers him around, only to be joined by several more by the end of the dungeon. Is there a way to make a replica of one of these that acts as a follower? They have no collision against the player, but they seem to be able to knock clutter around (I'd be fine with no collision whatsoever), and they make the cutest little noises as they bounce around.

Image of a ball:
http://i116.photobucket.com/albums/o22/98LS1TA/TESV2012-11-0218-58-37-95s-2.jpg