I'm sorry but I just have to say this. I cringe every time I use the term "learning object." There, I feel better now.
Dan Mitchell and Will Richardson are talking about Learning Objects. As I read their posts I noticed that my son was actually using some real, tangible Learning Objects... As I looked around the living room floor, I also noticed that they were "distributed." Now we need an aggregator to help collect them. As for notification, the best method is to walk across the carpet barefoot. This method seems to be the best I've found when looking for distributed "learning objects" of this type.