I never did tummy time. With my first, I tried it and he just cried, and I do not believe that crying teaches babies anything, so I stopped. With my second, I didn't even bother. He was worn a lot, but I didn't stress out about it at all. Both my boys have plenty of upper body strength (too much for my tastes ) and were both early walkers, so I think I did something right.

I have to wonder what people did before we had helpful doctors telling us that we need to put babies on their tummies for X minutes a day. Somehow I doubt that they all ended up with delayed upper body development.
*Poster formerly known as Bailey422*

Here's all you have to know about men and women: women are crazy, men are stupid. And the main reason women are crazy is that men are stupid. ~ George Carlin