To make a terrarium, choose a glass container with an opening wide enough for your hand. Gently add an inch or two of washed, fine gravel. Top gravel with a thin layer of activated aquarium carbon. (You'll find both items at your local pet store.
How to make a Terrarium in 4 steps … The size of your container will affect the amount of materials you will need and use: The first layer is rocks, which you can purchase at pet, garden or craft stores. Add enough to the bottom for adequate drainage.