A clear glass container with a wide neck to allow your hand in Small stones or gravel Activated charcoal (get from pet store) Potting soil Small sponge Piece of screen, mesh, or cheesecloth Plants or moss

A terrarium is a completely self-supporting ecosystem. The plant life replenishes the air with oxygen, light shining through provides the light and power source, and water comes from the moisture in the soil. As the dead leaves fall off, they decompose providing food for the soil. How to make one: