Some of the Florentine palazzi had a special little feature to make the lives of the little boys and girls just a tad more interesting. Below some of the regular windows, small windows (finestrelle) were installed. They were protected by wire mesh, so the youngsters could safely sit there and observe the street life below them.
The two examples I have found so far have been completely closed in. I guess the little ones watch TV or play with an iPad these days.