Quoting Rebecca Hasbrook:" You mean you don't have to do it? Everyone makes it seem like my kid is never going to sit up or walk if I don't do it.."
Lol, it is good to try it out here and there. But your son doesn't have to be on the floor for 20 minutes a day or some smurf. Lay him down for a few minutes on the floor with ya, when he gets tired of it, then stop. It isn't that vital, people are crazy.
My first would only do tummy time for maaaaybe 3 minutes, tops. I still tried and got those couple minutes in. But he was fine, doctor wasn't worried about it at all. He sat up right on time, crawled early, and walked right at a year.