I live in an urban center where the closest thing I have to green space near my apartment is the moss growing on top of the parking garage I can see from my window. And while there are trees and parks and things fairly nearby, sometimes it’s raining and sometimes you’re lazy and sometimes you just want your own garden to reassure you that your urban center existence isn’t all bleak minimalism and IKEA furniture, you know?
You basically need a tin, some seeds, and some tissue. You could use dirt, but also: you could use toilet paper. There are official instructions at Instructables.
Photo from GOMI Style.