Awesome room. My only suggestions are to ditch the wheel on the windowsill. It could fall off while they are running in it and injure one or both of them. Also the silent spinner wheel in the cage is dangerous. It has little openings where the two parts connect where a glider could easily get it's nails or toes caught or worse. Also, the bearing on the back of the wheel can get tails caught and wrapped around it. I suggest getting a Stealth, TGI, or Custom Cruiser wheel for them and tossing the wheels you currently have. You also have a lamp in their room. Is there any protection covering the socket and cord? Gliders will chew on things and any wires pose a risk. I would just purchase a night light you can plug in when you are in the room to play with them, that way you can take it with you when you leave the room to eliminate danger. You should have some sort of grate over the tray with the Carefresh bedding to keep them from having contact with their own feces.