From 6 months on, infants are said to have 20/40 vision, not too shabby. However, in my experience they have a pretty intense case of tunnel vision. When their eyes lock onto something, the have an iron clad focus that is rarely broken by anything else. And now that he moves on his own, forget about it.
There will probably be a lot of hands and feet since much of Jack's attention is on the objects within reach.