I think Lego is used in the same way as "milk". You have to arbitrarily divide it and has no natural division. You don't have some milks and you don't have some Legos. A Lego set is like a glass of milk. But sooner or later you just end up with a mess of hundreds of random pieces spread across children's lives like grains of sand. You hope they stay in the sand pit, but they will get everywhere.