I used to believe that there were green, yellow and red fairies that would stick their really big bellies into the traffic to make them change colors. The green one was the nice one that let the cars go; the yellow one was always in a hurry and so could only do her job quickly, and the red one was nasty, thus slow traffic. My mother says she used to say 'Come on traffic light fairies, make the light turn green!' when I was in the car, so that's probably where I got this theory from.
A childhood belief about traffic lights

others believed things like this
- My dad could change a traffic light from red to green using our garage door opener.Anon
- i used to believe that red yellow and green meant "ready, set, Go!" on traffic lights..— cabagona
- that the green traffic light turned blue when it was off— Kriket Evens
- I used to believe that the yellow light in traffic-lights meant Go Faster!— M. L. E.
- I used to beleive that little drawf men were inside each traffic light, making them change colors. — alisha
- I used to belive that there was a god living in every traffic light, controlling the traffic!— Sukhi