What Now?

O.k. , those of you who know me know that I'm new at the mom thing, and everyday I'm surprised by something new that Truett does. Yesterday I was doing the dishes and Truett was in the living room playing in his gym. Usually I hear constant movement, but I noticed that there had been silence for several minutes. I peeked around the corner and Truett was no longer in his gym, but right next to it on his hands and knees. This is the first time this has happened. I could tell he was really excited about this new trick, because he continued maneuvering himself around without fussing. So I need to know...are we close to crawling or do we still have several months? Right now my house isn't baby proofed, because he has always politely stayed where I left him, but I need to know if that's about to change. Help moms!