I have observed a Phenomenon among older Eurpoean Jewry ( i.e. Yiddishe mammes and bubbes) not to display pictures of their children or grandchildren ( eineklach) in open areas for fear of ayin hora.
[And if they do show someone the pictures ( when they can't hold themselves back), there is a custom that the other person spits as if to ward off the ayin hora, well not really spit but they make the tzu tzu noise as if they are]
Does anyone know of a source for this and how far does it extend?