6 months old

I cannot believe 6 months has gone by already!  2 days before he turned 6 months old Calen finally figured out how to sit up for longer than 30 seconds.  The first time was 4 minutes and less than 24 hours later he was sitting for 20-30 minutes at a time.  He only fell over backwards twice before he learned to flip himself to his stomache as he fell.  He weighed in at 18 lbs 3 oz (60%)  Length of 26.5 inches (51%).  Calen still has acid reflux but hardly spits up anymore.  He is still smiley and very talkative.  He started making the Ba noise in addition to Ma and Da.  He often sounds like he is saying Hi but has yet to officially say the word.