He made a beautiful run just outside their door but the typist thought the Siberians need places to get
up high and enjoy the view - so this is what the builder came up with - There are three longs runs suspended from the ceiling like the one Miisu is laying on.
They connect with gang planks for the kittens to walk or as they get braver they simply jump from one to another. Room for the whole litter of kittens and all the girls to hang out and look down on the rest of the world.
I gotta say the builder is a pretty handy guy to for a cat to hang around with.