I really don't remember when my other kids rolled over, but I think it was about 3 months. I am certain they were not rolling over before 1 month. Addy is though! She started rolling from tummy to back yesterday. She did it 4 times. I tried again today to be sure, and yep she can do it. She wasn't so happy about doing tricks today though. I did take a video if you want to see. Just click the picture.
Even if I'm forgetting the average age for this, she still amazes me!