Explore the world of science by creating your own mini ecosystem with this terrarium kit for kids! A terrarium is a miniature garden in a simulated natural environment. The Grow N’ Glow Terrarium is a complete science kit for kids to explore and create their very own miniature eco-system. It’s so easy and comes with everything you need to decorate and complete a Grow N’ Glow Terrarium with two plant life-cycles.