Since our kitties are all quite fond of spending time in the back yard,
we have a cat flap in the back door. It's got a little control knob that
allows us to set it to allow the kitties to pass through freely, exit
the house only, enter the house only, or lock it closed completely. We
leave it set to "open" when there's a human home with them, and when we
go to bed at night we set it to "closed" and drag a plastic bin full of
kitty litter in front of the flap.

Either Samuel Kitten has taken his previous name of "Houdini Kitten" to
heart, or one of the girls has decided to branch out. Last night when
Nancy and I returned home from running errands the litter bin had been
pushed aside, the control knob was set to "out only" (just a hair short
of the "open" position), and the two kittens were out back. Whichever
kitty turned the knob did so almost perfectly, just stopped a little
short of what they were trying for.

I guess it's time to weight the bin down with more litter!