This is a green house made out of a plastic bottle that keeps your plants really warm inside your house and traps the heat inside from the sun coming through your window. It can be made in less then five minutes. Hope this works as good for you as it did for me.
Step 1: How A Greenhouse Works
First of all what is a greenhouse? A greenhouse is a glass building where plants grow that need protection from cold weather. And how do these structures help plants grow? Simply greenhouses let sunlight pass through the walls to heat up the air inside through radiation (not cancerous radiation). Once the air inside is hot it does not cool down very fast and if there is still sunlight it will stay warm because of the glass protecting the inside from the outside elements.