Robs are nocturnal. I am most definitely not. The result of which is that I'm usually sound asleep by the time the little beasts get active.
However, last night I didn't get home until closer to midnight and Knerten was at it running in her wheel. It would've been fun to sometime, somehow, measure exactly what distance she runs in the course of one night. Fjerten too, for that matter. They run and run and run and run... Gråperle/Pearl did also, but she also climbed a lot. Fjerten has Pearl's old cage with plenty of climbing options, but I never see her climb except when something has scared her and she's trying to get away fast.
They both run, though. And run and run and run. And look around a little, and then run some more. This is Knerten from last night: