A shallow bonsai dish, with drain holes in the bottom can make the perfect little landscape.
The many types of moss that is native to my garden can be tiny and fine textured, some looks like little ferns, and others still are a bit larger scale.
Moss doesn't need much soil - some will even grow on rocks, with no soil, or on old carpet; it's only requirement is dampness.
Shiny polished rocks emulate a creekbed, and the larger rocks look in perfect scale for the tiny landscape.
This technique of making tiny gardens has been a popular artform in Asian countries for centuries.
Multi textured carpet of different kinds of moss - there are many that grow around my property, so finding the ones that don't mind this type of planting is easy.
Watering is important; moss will go dormant or even die off if the moisture levels aren't kept up.
This is one container that will have to be kept in the shade, so it never has a chance to dry out.
However, moss is a very easy going plant - even after being dried out, it will green up again once conditions improve. See more about growing moss here.
Several months later, even with mostly benign neglect, this little garden required only a tiny amount of cleaning of pine needles and leaves and it was ready for its close up;