In the 1932 "Flying and Gilder Manual" there's an article and plans
for a "penguin" that is said to suitable for boys. It's the same sort
of thing. I think the idea of a air sled on skiis is not quite as
useful today because there's less ice, but the idea of an airboat
that's an S6B without wings is something I find curiously attractive.

One thing that puts everyone off is the obvious danger of the idea.
To the men and boys who looked at the plans and who may have built it,
there was a lot less danger. To be safe, bystanders need only stay
away from it. We, as a society, seem to have lost that ability to
avoid danger. There's a place for a study of the changes over time
in the perception of danger.