As a child, I went to parties all the time and had a large collection of helium ballons. One day, I was channel surfing and saw a show on how there could be life on Mars.
Seeing this, I immediately got a lot of random, lightweight objects* and tied them to my ballons. I ran outside and let the ballons go, knowing that someday they's either reach Mars, or fall miraculously out of sky onto someone's head.
* the things I remember sending are: frozen hot dogs, a soggy feather, my dad's old watch strap, a song in a Ziplock bag, and a 'paper bag of air'
A childhood belief about aliens

others believed things like this
- i used to think that mcdonalds served ballons..(the sign said billions and billions served)Anon
- Does anybody remember that song "OUT OF REACH" well i remember i used to sing it as "BATTEERRRRYYY". — meeeeeeeee
- Since lions and tigers are larger versions of cats, I used to believe bears were large dogs— Chris Ayala
- On TV game sows when they said the winners were chosen "at random" I thought random was a town.Anon
- i used to believe that dogs were born in the sky and would fall from a paracheute.
-Dante-— Dante - I swear I heard a Disney Channel/Radio Disney song where the chorus was a repeated “Damn it”— SpengBab