Travis (10+ months) has done it. He crawls up the entire flight of stairs unassisted. It is amazing his speed for the stairs when we forget or haven't had a chance to put up the gate to guard them. The kid is half-way up before my foot exits the last step! Travis also has a mouthful of teeth now. Two on the bottom, two fully out on the top and two more on the top bursting through (I see the white in there!). My baby is getting so big! It will be fun to see how he gets into everything this Christmas.