One summer while on a long road trip (Minnesota to Florida) with my family, my Dad bought a bunch of beef jerky as snacks. I was really bored and 14 years old, and I convinced my 6 year old sister that jerky was tree bark. My then 13 year old brother continued the joke, and my little sister spent the better part of 2 weeks trying to rip bark off of trees in florida. She stopped eventually after we (my parents included) told her that it was only certain kinds of trees that had the right bark. It took another 2 or 3 years for her to figure out the truth.
A childhood belief about general

others believed things like this
- I was convinced that paper could only be made out of Birch trees (because they had white bark).Anon
- I used to believe when dogs bark and cat meow they are talking to each other— frogg gurl
- I thought that 1983 went on for 3 years - had to ask my sister who decided how long a year lasted.— Sally
- I use to believe that everyone in Florida didn't go to school because it was warm all year around.— Julia
- My older sister had me convinced that noodles grew on trees, but that rice was man-made...— Trusting little brother
- I used to belief sloths lived in trees outside my childhood home. My older sister told me so.Anon