Suppose, just for the sake of argument,

"Xenophile" wrote:

"Suppose, just for the sake of argument,
that I wanted to build something that would simulate low gravity for
children, even teenagers."

NASA trains astronauts to work on the white eleph -- I mean, the Space
Station by having them wear their pressure suits in a tank of water and try
to perform tasks with various tools. Not as easy as it sounds. I guess
that's the closest they can come here on Earth to simulating actual
conditions.