Swedish relatives names-unknown decade estimates please

[otterspotter]

Please could anyone offer dates/decades for these 3 images? Many thanks.

1 The round photo and back. This may be a later decade copy of an older photo.
2 The home interior with children (I suspect, someone is behind the white sheet)
3 The girl in the photo studio

[jim1]

The first is 1870's.
Children are quite difficult, but I would suggest both Edwardian.
You're probably right about someone under the sheet.
It wasn't uncommon with youngsters as they were fidgets.
There was a standing joke back in the day about a man on
trial for murdering his wife, he said he'd spent all day photographing
children, the judge said "I used to be a photographer, not guilty".

[otterspotter]

Thanks very much Jim 1 - and for the joke