Thank you for doing this for the kids! It's not something that many get to see, much less try for themselves. I love it, but as I looked through the pictures it dawned on me that probably a few of those kids may have never seen a recent sewing machine up close, and they might have the impression that sewing is something people did only in the old days. It would be cool to put a modern machine side by side with one of the hand cranks and demonstrate that much of the working concept is still the same and the stitches can look the same, too. We owe a lot to those who went before.
By the way, I grew up in Leavenworth and have many fond memories of the town and Kansas. Last I saw it was a few years ago for my 50th LHS reunion.