When I was quite young, I desperately wanted my very own swingset. Then it dawned on me: unlearned in simply physics, I believed I could simply get a piece of rope, hold each end in opposite hand, and then while supporting the rope, I could just sit down and swing myself. Unfortunately, as you probably guess, it did not work quite as I had expected.
A childhood belief about physics

others believed things like this
- My freinds mother said that if you hold a cat without supporting its bottom, that its insides would fall out.— Jessie
- My sister thought that she could video me by simply inserting the VHS tape into the VCR sideways.
Anon - I thought that an ambassador was simply someone who wore a tuxedo, top hat, and a monocle, and held a cane.— GE
- That unicorns were real. They simply had invisible horns that only people with special eyes could see
— Katie - I used to think that swing music was called that because you listened to it when playing on the swing set.Anon
- I used to believe fax machines instantly teleported a piece of paper to who ever you wanted. Anon