Tummy Time

Jacob likes tummy time more than James did at this age, but I also have been better at doing it with Jacob than I was with James. 

That probably has something to do with it. 

Jacob is good with lifting his head.

He so wants to be mobile, and constantly tries to move, which normally results in him pushing his face into the floor.  I have a feeling he will master rolling and crawling much sooner than James did.  This is mostly due to the fact that he really wants to play with James.