Since you don't house them together and just place them like this for a quick photo shoot, it may be OK. However, that amazon milk frog of yours is the real danger. They produce a white, toxic secrete (hence the name "milk frog") when stressed and that would probably be less than ideal for the other frogs, if they would get some on them.

And no, that waxy terrarium is not an adequate home for a tree frog, if you ask me.