Stück Natur: The Microenvironment-in-a-Jar by Hans-Rucker & Co. This is a museum piece, but looks easy to duplicate with a miniature house or shed, soil, and moss in a covered glass jar - very charming!
WOODLAND TERRARIUM: "It may be gray outside, but it's always green in these moss terrariums. We used kitchen canisters, which are readily available and inexpensive; their tight-fitting lids capture the condensation the plants require to thrive." Love it!