This is an interesting door hanger cat toy.
The Fling-ama-String is an automated-battery operated cat toy. It can be placed on any standard door knob to give your kitties hours of fun. It works by flinging out a string and quickly pulling it back in. This of course will drive your cat crazy, trying to catch and hold onto the string. The device comes with a security strap to wrap around the bottom of the door so even a very strong kitty won't be able to pull it off from the door. It has two speeds of operation that will entice any kitty to play with it. The Fling-ama-string requires no assembly and runs on 3 AA batteries.
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