When I was a boy, I really liked it when, in "The Day the Earth Stood Still," the boy character, Bobby, whipped out his train set platform from under his bed to show Klaatu, who then picked up part of it to explain there were ships in his world that had an arrangement similar to our trains.
I believe I am remembering that correctly, from decades ago.
Anyolways, I loved that movie, especially the spaceship and the robot , Gort. Klaatu was pretty cool, too.
FrankM
P.S. "Klaatu barada nikto."