Milk jug rings until I found out Scamp was chewing them to the point they'd disappear! So no more ingesting plastic. I give him the heavy rings off of juice bottles and he's just as delighted!
Cat dancer- i don't even have to make it dance. It lives on the floor and when old Shy gets frisky, she drags it out and has herself a hey-dey!!
The light off my watch on the wall is a good one, just like a laser light! And a loose moth or ladybug in the house is a good time for all. Pixie always gets the bugs! She eats them, then darts around frantically looking as she has forgotten she just ate it!