When (mostly) young people with self-taught computer skills have too much time on their hands, they...hack, steal identities and scam people.
When engineers (again, mostly young)have too much time on their hands, they create technically sophisticated and completely impractical things. At least they're doing it for fun, at least sometimes.
A case in point is a bicycle without wheels.
Now, this bicycle could, at least in theory, move across certain kinds of terrain and roadways.
Here, however, the term "move" is somewhat elastic. Yes, they can traverse said real estate but, as one commenter said, "Finally, some one made a mode of transportation that's as fast as walking with ten times the effort."
Just what the world was waiting for, right?