They are certainly still adjusting to their new home. How old are they? Are they in their original cage or a new one? I'm sure there are differing opinions on using the bedding, Pet Fresh has both the shavings and the confetti kind. I think you're referring to the none wood shavings (which are
not to be used with gliders). Many cages for gliders have a metal grate that separates the drop pan...keeps them from getting into their own messes or grabbing up food waste that might be spoiled. Much easier to clean as well. I would worry that they may ingest some of the bedding.
Is the pouch that you've offered also new to them? If so do you have anything that came with them that has their scent? It will make the transition easier for them if they do have something familiar. Offer a couple of different pouches for them to chose from. They will probably settle in soon.
Good luck with your new babies!