I have always been of the “let kids potty train each other by example” persuasion and it worked quite well with Daniel. We left him until he was interested and didn’t push him as he was smack bang on schedule.
We also never bought him a potty, he went straight onto the toilet with a step and seat that he did of course manage to break in 2 days.
I’m thinking girls are a little different though and as much as I loathe a potty, I’m starting to think that it might be a good idea for the girls. They are starting to look interested so I want to be prepared.