I was adopted at 2 1/2 so my Dad always told me adpoted children were the best kind because my parents got to pick me out and other parents were just stuck with the kids they got.
When my parents adopted my little sister (I was 4) they let me go into the room to "pick her out" For years I held it over her that she wouldn't even be here if I hadn't picked her out. I think I was around 12 when I remembered the detail that there was no other child in the room besides my then 9 month old sister. My sister was in the late teens when she figured out the truth.
A childhood belief about family

others believed things like this
- I used to believe your parents PICK your birthday.— Stella
- I used to believe my parents were brother and sister, and that everybody's parents were brother and sister.— Rachael
- When I was little my parents used to tell me and my sister that carrots were "orange candy." — Nancy
- First I believed that my parents were brother and sister. Then I thought that my dad was also my mums dad. — Rainbow
- I used to believe that my parents and sister were alligators underneith there zip on human costume...haha— Alyssa
- My mom told my sister that if she didn't eat her peas, her period would last for an entire month.— Maya