I can't take a photo of the setup until after a class I'm in. And they actually are active, but they seem to prefer that den. And they're not directly on the substrate, it's just close to ground level. I think it may just be them being afraid of me, because they still sometimes jump back into the den whenever I come into the room/turn the light back on/open the tank. As a matter of fact, Boom, the smaller guy has actually been poking his head out of one of the openings today, but hiding when I come in. As for the plastic plants, they actually have been climbing/hiding in the plastic jungle plants when they're out, so I don't think that's the issue.