Cottage Living shows you how to take a glass ornament and turn it into a tiny terrarium. From the article:
A terrarium is simply a glass enclosure used for growing plants indoors. You probably remember terraria from the dark days of grammar school science class. Terraria got a bad rap mostly from being grown in ugly old fish tanks or large plastic water bottles. Here we reinvent the concept, creating a world-within-a-world that’s both simple and a bit sophisticated.