I think you will have trouble with orchids. They are fairly fragile to grow, and need very strict growing conditions to thrive. Also when you new guy/girl gets all happy and decides to jump all over, your orchid(s) will not be happy with this at all. I would go with something that needs low lighting, is hardy, and can handle your frog taking either love or aggression out on it. A separate pot will be needed as well, because they will just dig up rooted plants (edit, i see you plan on doing this) . Like Emily said above, no fertilizer should be used.

Philodendron looks like it may work out. It calls for light shade. Just ignore the fertilizing part.

Pinguicula I personally own one of these, and couldn't imagine it working in my ABF's enclosure. I also own a VFT ,(venfus fly trap) Sundew - Drosera filiformis, pitcher plant (forget which one but it's part of the sarraceniaceae family), and butterwort. I could not imagine any of these making it with mine.