Thanks. I am going to try and make some fake trees. Experiment and stuff like that. I have always been good at art. If i come up with some, I may offer them for sale. I will further post some information on this post. Or may create a new post.
If anyone else comes up with ideas, or anything, post it here. I think that those fake trees really add some natural look to the vivarium, especially if the trees look good. Because in my research on dart frogs, they are often found around the base of a tree. Plus they just look cool.