Yes, I have a couple that like to keep their tails curled.
Some gliders actually use their tails to carry small objects like bracelets or the rings off of milk jugs.
If you give your gliders the milk rings be sure to cut them so they will not get stuck in them. They will put the ring over their head and wiggle through it until they get it to their tail then they may carry it around. It is fun to watch.