Emmett is seeing a Neurologist!  We are trying to figure out why his gross motor is so delayed.  He can't walk down the stairs yet, and he didn't walk until 18 months, and he still moves his head from side to side in a rhythmic motion.  We did an MRI of the brain, and everything looked normal.  The pediatrician also thought he might have some slight CP, but the Neurologist cleared him for that as well.