There are a ton of different kinds of terrariums you can make. They are pretty easy to do and make a nice gift or a center piece of even something to sit on your depressing cubicle desk.

I’m taking some horticulture classes at a community college near my house and their gardens and green houses are COVERED with the most adorable mosses and tiny plants. I took a couple of half flats that were just filled with this moss so that I can make a few terrariums with the masses of lab glass we picked up on the street a few years ago.

Storm the Castle has a nice list of different kinds of terrariums you can make.

The Fern and Mossery has a good couple part terrarium tutorial.