This one isn't mine, but it's one my daughter picked up from me one day when we were driving. She was about 4 years old at the time and we were driving to the zoo for the day. We were passing a power plant with the two large steam silos that were giving off quite a bit of steam. My daughter asked me "Is that where clouds come from?", I was only half paying attention to here remark because I was driving but I responded, yes. We were driving the other day and she called me out on it. She's now 15 and knows better, but we both laughed as she confessed that she believed that's where the clouds came from until she was about 8.
A childhood belief about chemistry

others believed things like this
- I used to believe that driving caused the clouds to move.Anon
- I would think that every car that either my mom or dad wasnt driving a ghost was drivingAnon
- I used to think the clouds were made of the steam that comes out of the factory smoke stacks.— TJ
- When I was a kid, I used to believe a nuclear plant was a clouds plant and could make magic clouds.— Tommy
- i used to believe that clouds were made from the thick smoke that came out of power plant towers.— Rick Shaw
- i used to believe that drinking and driving was when you were drinking while driving— fay