[Cotton]

She sounds like a busy, normal hamster, rearranging her home. I had a dwarf hamster who used to do this regularly with a wheel. Her home did not have tubes. I put a second wheel in her home so she still had one for running and she put substrate in and around the first wheel.

Is your hamster a Syrian or a dwarf? I am looking at the paper towel rolls and wondering if a dwarf could "pancake" through that? That's not meant to be critical. I was shocked the first time I saw just how small a space a hamster can get through.