He is still working on the four teeth coming in across the top. The two on the right side are poking through quite a bit now, so the new thing is grinding the bottom teeth against the new top ones. Aaahhh! The sound makes me cringe, but I am sure that the newness of it will wear off soon - I can't wait! All the grinding and feeling the new teeth puts a very serious look on his face much of the time lately.