I know what you are saying. What the heck is that and why does it cost so much? These tiny bottled plants are Marimo. Marimo are a Japanese water algae that grows in a ball shape. They look really neat in the wild, where they are formed by currents and actually roll across lake bottoms like tumbleweeds. Now you can get your own tiny algae pet or even a family. Family of three $25 at eGardenStudio.