Now that I've discovered the brilliance of the terrarium, I plan to stock my apartment full of them. Etsy seller TortoiseLovesDonkey has some adorable mini terrariums for next to nothing. So cute! She also sells a three-month air plant subscription, where she ships three air plants to you every month for three months. Love it!
If you're interested in assembling your own terrarium, ReadyMade offers some simple instructions.