Yes, I haven't seen the kittehs in their box for a while. I presume they spend most of the time wandering around and raising hell.
Similarly I think you'd have to watch my Cat Flap Cam a lot to catch Kai or Zev shooting through at speed. When she hadn't worked out how the cat flap worked, she did spend some time sitting by the cat flap watching it, and presumably waiting for someone to come through, or try to come through, in the case of the local troublesome interloper Tabby. Since I also opened up the cat flap for kitten ingress / egress twice a day, there were also periods when you were more likely to see her as well. These days, their passage through the cat flap seems to be a bit more rapid.
I may see if I can find somewhere else to point it, probably one of the cats favourite sleeping locations.