Thanks, folks! I think they are pretty neat!!!
Yep, H and I are going to get them a bigger container this weekend or the next (when we get around to PetsMart / PetCo). I'd like to find another acrylic container because I like the way that looks better than the glass aquariums I remember from years ago. I also want to put a layer of that biogravel / filtering gravel in the bottom like it has now and put some pretty colored gravel on the top -- I hope PetCo / PetsMart carry that kind of thing. From what I've read, they don't need a filter and the vibrations are stressful to them. We also may need a new snail because the one in there, I haven't seen out of its shell. It has moved, but I don't know if the frogs have pushed it around, or if it has moved itself (basically, I don't know if the snail is alive or not).
I wonder if a couple fancy gold fish can go in with these frogs?
Gonna get a couple betta too, for decoration (that probably sounds awful). I have a place I want to set two containers and think I'd enjoy watching them probably more than the frogs.