I let my two do just about anything within reason. I too am couch bound at this point. I have two girls so we do a lot of coloring on the couch. Kids do not need to be entertained constantly by an adult. Letting my girls play, build forts, color in the living room with me seems to be enough for them. They have the occasional fight or breakdown about me not being able to get up. Don't feel guilty. Do what you can do and remind your kids that it could be way worse!