I saw Ann Curry making terrariums on the Today Show a few weeks ago and I can't get them out of my head now. It could be because she kept calling it a terranium, which I thought was funny, but I think it's because they were just so pretty. Definitely not like the one you made in an old plastic fish tank in the 3rd grade. These would make a great Mother's Day gift!
Here are some handy instructions for making one. And if anyone (hint hint) wanted to make one for me, I would let him know that he could get a jar like this at Hobby Lobby.
I also love the pedestal style apothecary jars. These would look fabulous clustered together in a variety of sizes on a shelf or a mantle.