I had learnt in school that carbon dioxide turns lime solution white...so if you blow into lime water, it will turn milky. After that everytime mom made nimbu pani (lime juice), I'd spend hours blowing into it, waiting for it to change colour.
A childhood belief about chemistry

others believed things like this
- I used to believe that CD's were made of glass, until I learnt otherwise.Anon
- I used to believe that before colour TV the world was black and white....— Dougie
- I used to believe that the whole world was in black and white before colour TV was invented...— Robsa
- I thought that cars could only make turns when you used the turn signals...— Toby
- I thought that grape juice was called "great juice". Anon
- I used to believe that if i splashed water on the wall during a bath, the water would turn into spiders— justin