Sounds a bit of an alien concept but once you've had a chance to look at the video it will all make sense.
This video really comes under the category of inspiration where time is not of the essence. You'll be taken through the whole process step by step and see exactly how it's done. All of the accessories are very accessible - with the exception of the tank, you'll easily be able to purchase most of it without issues. And of course, we already sell Terrariums if you wanted one of those :)
We've also a range of mosses that would fit the bill too - Christmas moss is one that I think would be particualrly suitable.