You can soften up your whole living room with a nice soft rug that will not only cushion your baby's falls but it will also act as a great play mat for him. (thankyourbaby.com)
I have also seen posts showing storage solutions from very simple, compact setups to very elaborate setups that would probably take up my whole living room! (theclothdiaperwhisperer.com)
My daughter pulls together trains, Lego pieces, kitchenwares, games and make Rube Goldberg-esque... MORE contraptions that can take over the whole living room. (thespruce.com)