Before Louis Pasteur’s disproving of spontaneous generation, most people believed that bacteria and putrefactive organisms like maggots etc. spontaneously poofed into existence, like a video game character spawning. Pasteur suggested that maggots came from flies laying their eggs on rotting meat etc, and that bacteria were everywhere and will multiply quickly under the right conditions. A lot of people at the time thought these were crackpot ideas.
I still remember the way my science teacher explained a hypothetical warp drive (like how it is in Star Trek). He took a black towel, representing space, and laid it flat on a table. He set down a miniature model of the Enterprise on one end of the towel, then accordion-folded the towel up so that the other end was close to the ship. He moved the Enterprise over to that end of the towel, and unfolded it so that it was flat again. The Enterprise was now on the other end of the table.
An overly simplified visualization, but it really illustrated the idea to my ten year old brain how space-time could hypothetically be bent to make fast interstellar travel a possibility. Also it made me realize that warp speed on the Enterprise wasn’t just a super powerful rocket or something.