This trailing Peperomia is a gem in the terrarium.  It has nice rotund foliage that stays about 1/4 inch, and it will creep along the substrate forming a nice mat over time.  In brighter light, the leaves and stem have more pink, and green venation is visible.  In more moderate light the foliage is a nice bright green with a nice silvery sheen and red stem.

Available plants are offered as cuttings approximately 10″ long (or two pieces of 5″).  I tried selling these as potted plants for a while but they are challenging to ship due to their delicate and small leaves.  They ship wonderfully as cuttings in sphagnum moss, though!