Searching for a younger pigtailed girl, currently being aired (episodes around 790-800 but not always in pigtails, soon on my pigtails blog), I found this girl (Julia Stark as Sophie in 2001 ep 822, pic 1) in bibs and a woman in working bibs ep 1593 (maybe the same woman as in ep 1548).
The girl and her bibs are very interesting. No real straps but strings. Could also be shortalls or similar. This episode will be aired in a few weeks but is also available on Youtube, like the other one.
I also found a toddler boy in an early episode, but no need for posting that.
There are probably much more actors f/m. Rating currently 7 f/m.