1-Second Neck Exercise

Elliott has very little interest in doing a "cobra", or even picking up his head, during tummy time.  It seems lying and sucking his thumb has become a comfortable place to be.  I finally found a trick, which is to lay him looking to the right.  He picks up his head, turns to the left, and lies back down where his thumb of choice is readily accessible.  End of exercise.  This is a little troublesome, since friends and cousins born around the same time have been doing a cobra for over a month now.  All in his own time... and who can blame him with a noggin measuring in the 99th percentile?