Wowzers you know your stuff! I think it would be a fun challenge, as you say, keeping a pair of frogs in a wardian case. moving it into warmer spots on cool days and to the window for light when weather permits, tiny bits of misting, trimming plant in a sorta bonzi fashion. little moss and some nice landscaping. sounds very steampunk-ish as well. could even use an old aspirator and other antique looking equipment, thermometer and such to have the whole package. sounds cool!