I am working on a dentist office and the owner loves nature. When researching my finishing touches for the dental lobby, I discovered Terrarium's are back in a big way and boy are they cool for an indoor space.
Check out this article on How to Plant a Terraium. Then shake it up a little by finding neat containers for your indoor garden at UrbanOutfitters, TJ Maxx, or take a look under your sink, you may have an old jar, fishbowl or glass flower pot that will do just fine.
How to Plant a Terrarium, Terrariums, Indoor Gardening: Gardener's Supply