Several sub-compact/miniature orchid plants might work and they seem to grow best mounted on cork. Cork mounts are interesting all by themselves. Four orchids that come to mind are : Oerstedella centradenia, Bulbophyllum rothschildianum, Eurychone rothschildiana, and Gramm. scriptum var. 'Kiilani'. One plant that can bloom for six consecutive months, is a sub-compact, and grows best in a tiny, 2" basket is the Phal. equestris. You could hang the basket near the top of the terrarium, allow its roots to dangle.
drdawg (Dr. Kenneth Ramsey)
The reason it's so hard to lose weight when you get up in age is because your body and your fat have become good friends.