As far as I know, your Arabian coffee plant
should be just fine -- a friend of mine, originally from India, tells me that the coffee leaves themselves can be dried and roasted, then ground and used as a coffee substitute.
I don't know if it's the same plant
, but I think the botanical plant
name of China doll is 'Radermachera' .. if so, it's generally safe to ingest, tho not recommended.
Here's also a site that lists plants
that are non-toxic to pets ... if they're safe for our furry & feathered companions, they should be alright for us too .. Plants & Pets - Non-Toxic Listing