I'm pretty sure there was one of these in my window when I was a kid.
Image via www.parenthood.com
Apparently they are no longer de rigueur as people don't want perverts to know where their kids sleep.
Were there fewer perverts in the 70s? Or maybe not, but people weren't as frightened of them?
I can't think of a time when children were known in the general vernacular as 'tots.'