I've tried that but they just like to sniff my phone lol. They are very light sleepers and the floor around their cage is very squeaky. This is as close as I can get before they wake up. As soon as their awake they are at the cage doorThe lens on your cell phone should be smaller then the space between the bars so you have to put your phone right up to the bars and align the lens through a gap. I've gotten some good top down ones of all of them sleeping in the hanging bed together by setting my phone on top of the cage and shooting through the gap in the bars. Like this one...