I really like the clarity of the view through the knothole. It's a tough call but I get a sense that it could still convey the idea if the 'view' were a bit larger -- or if there were something more arresting for the viewer's attention to explain the suggestion of 'peering' where one perhaps shouldn't.
This is a very creative shot, but I almost wish there was more detail in the area around the knothole. Having said that, I still like this image a lot. Nice job.
This is so cute! I have one of those holes in my fence. My dogs always peek thru it to see their buddies in the next job. Great idea for this challenge. What a pretty yard on that "inside" you are looking into :)