I want to rabbit proof the playroom so when people aren't here my rabbits can run around that area. 

There is an elliptical in there that has a cord.  A treadmill that has a cord...lots of other things that they can get into.  I pretty much know how to bunny proof but where can I get cord protectors that will fit round cords?  The ones in my room I got from home depot but they are flat and not for that type of cord.  Home depot didn't have anything else.  =/  

I use aquarium tubing from the hardware store (Maybe check Amazon for some? the clear stuff if you scroll down- http://www.homedepot.com/webapp/cat...EARCH+ALL)
) to cover cords. They have up to 1in diameter I believe. You can use NIC cubes to block off areas.

We have a treadmill. We actually ducktaped the cords to the wall out of Skipper's way. =p