Hey there, kiddo! Have you ever heard of something called a "liter of light"? It's a really cool way to create light without using electricity!
So, imagine you have a really big water bottle. Like, a liter-sized one. You know how the bottle is clear and lets light in, right? Well, people in some parts of the world realized that they could use these bottles to create light in their homes.
The first thing they do is to cut a hole in the roof of the house. Then, they fill the bottle with water and a little bit of bleach. They seal the bottle and stick it through the hole in the roof so that the top of the bottle is outside and the bottom is inside the house.
When the sun shines down on the bottle, the water and bleach react to make the light inside the bottle brighter. Then the light is reflected and refracted (that means it bounces around) inside the bottle and finally goes through the clear part creating light inside the house! It's like having a light bulb without electricity!
Isn't that cool? It helps people who live in areas that don't have a lot of electricity to have light in their homes. Plus, it's good for the environment because it doesn't use any electricity or power.