My baby is 5 months and doesn't seem anywhere near rolling.
During her awake hours, she goes out with me in her pram, she goes in her jumperoo and her bouncer, and sometimes sits on the sofa. We don't do a lot of floor time as it's a faff to set up in our (wooden floor) livingroom.
Should we be doing more floor time? How much floor time do you do with your babies?