The ultimate low-cost, zero-maintenance cat toy–a shadow. Any shadow will do, even a cat’s own shadow if there’s nothing else.
Note the cat chasing the shadow of his tail. Round and round and round–why don’t they get dizzy, doing that? My old cat, Buster, used to get dizzy if I picked him up and spun around a bit with him in my arms–but he always pretended he wasn’t dizzy at all. But I’m afraid his act never fooled anyone.