Just when I think you couldn't grow any faster, you go and surprise me again. :) It seems like you've changed so much even in the past couple of weeks!
Here's what you're up to half way between 5 and 6 months...
-You are this close to crawling. As of yesterday, you can push up on your hands and knees and rock back and forth. You did it a few times for us yesterday, and you were definitely showing out. :) I would not be surprised if you were crawling by the time I write your 6 month post.
-You are walking...yes, walking! If we hold your hands and kind of "push" you forward, you know to put one foot in front of the other.
-You are a bona fide stander. You require less and less balance from us every day, and you're completely holding your own strength.