My mom used to tell me that blowing at red lights made them turn green. I did so dutifully, amazed that it always worked (eventually). I learned the truth only when I started furiously blowing at lights in a friend's car.
A childhood belief about traffic lights

others believed things like this
- I believed that traffic lights had police officers inside them, turning the lights on and off...— CrowHeart
- when i was about 5-8 i used to believe that oompa loompas lived in traffic lights and controlled the lights!!— ~wierd ~
- i used to belive that if you talked into a bubble while blowing into it it would say what you said before— austin franck
- i used to believe that the green arrows on the traffic lights told you which way you had to go to get home.— Helen
- i used to believe that red yellow and green meant "ready, set, Go!" on traffic lights..— cabagona
- i used to believe that if i looked at trees, the wind would start blowing. Anon