swimming 20 months

Jack has been swimming since about 9 months.  He's getting really good at it (all things considering).   This video is a bit long.  It shows him swimming off the bench and back to the bench, jumping in and swimming, diving for a toy (a first), and finally floating (which he doesn't do well since he won't relax, but he was so tired by the end of the lesson that he did the best he's done yet).