Ebay is a great source for inexpensive laser pointers. A couple
days ago, I was at a friend's house, doing some plumbing. They
have a couple cats, and so I tried to ammuse the one with the
laser spot.

Interesting kitty, only seemed to watch the spot about half the
time.

Watches the spot on the wall, as well as on the floor.

Another friend of mine can get her one cat chasing around in
circles so fast, you'd wonder how the cat can stand without being
dizzy.