These kids (next to a 40mm scale "mother") are all in 28mm scale. The first two, from the left, are made by Reaper, while the last one (as yet un-re-finished) is by Wargames Foundry. The last one I will repaint and have him carrying a pail of whitewash.
As you can see, the figures work great as children for 40mm scale. Th girl could be age 8-10; the first boy, 4-6; and the last boy could be 8 or 9 years old.
They all will be included in my Gutshot Old West games.