Tips For Piggy Proofing A Room For Free Roaming Please

[EmmaE]

As the boys are moving to their bigger cage next door, I'd like to make the living room piggy proof for some free roaming. What should I be looking out for / removing? I'll be blocking the way behind the sofa, where the cables are. Anything else?
Thanks!

 

[MrsMoo]

Make sure they can't get under any bookcases etc, mine can get under and sometimes refuse to come out. Also houseplants out of their reach.