It's amazing to watch Ian's little brain work these days. We used to worry about him falling off the bed (well, Rich used to worry more than I did). But he understands the whole concept of the edge of the bed and deals with it quite well. Every morning, he wakes up and when he decides to get off the bed, he crawls over to the edge. He first looks over the edge to make sure the floor is still there. Then he turns around and swings his right leg off the end of the bed. Then slowly he pivots and brings his left leg off while grabbing onto the covers. He hangs there for a good 30 seconds or so pondering if he wants to commit to getting down. And then he lets go and lands (sometimes less gracefully than others).
It entertains me every single morning.