How old are babies usually when they start playing with their feet?

I’m just enjoying my son, he is 3 months old and ever since he was 2 months he has been in love with his toes. He gets excited if he can reach them and try to put them in his mouth. I thought babies did that older, but he was rolling over at 1 month. I have 4 other kids and he seems to be doing things faster than they did….except holding up his head, they all did it at 2 months and he’s still a bit floppy.

How old are most babies when they find their feet?