Here in England we have a Toys R Us advert that contains the lyrics: " 'There's millions,' says Geoffrey, 'All under one roof.'"
I actually thought they were singing, "There's millions of debris all under one roof," and was lead to belief all the toys at Toys R Us were cheap because they were made of debris.
A childhood belief about adverts

others believed things like this
- I used to believe toys came alive at night.
Because I love toys, and I hoped be good friend with my toys.Anon - i thought that we were all toys in a dolls house and giants playing with us was why we did what we did— Sarah
- when i was little i thought that toys had parties wee little partys when you would leave home— Dominique Tello
- I thought Santa was going to be sent to jail for stealing gifts from Toys R Us.— Sandy
- I used to believe that my toys played without me while I was gone and that was way before Toy Story!— K.ladybug
- When I was kid, I used to believe my toys were real, and , when I was out, they used to talk together.Anon