Time not only flies, but also seems to repeat itself

First some pictures!

Xander as Buzz Lightyear (thanks, Bac Thu!):

The boys watching TV/having fun:

Xander, the monkey (with his friend, the pirate):
Finally...Oh, you just missed it! Tian had pulled himself up, and was standing holding the lion with one hand, other arm outstretched, looking like he was going to walk across the room. Then he realized, "Wait, I'm 6 months old going on 7, and I probably won't make it...I think I'll sit down and eat this delicious plastic face...":

I was curious to see what Xander was doing around this time, three years ago, and lo! It's like déjà vu all over again. Tian is such a curious little guy, it's very exciting, and nerve-(w)racking at the same time...Xander didn't have stairs to contend with, so Tian is a bit more advanced when it comes to climbing, but one way or another, we are not ready for him to be making his way up steps, standing up and holding onto all sorts of flimsy boxes/shelves/chairs/etc., and generally being an even bigger monkey than his brother. Speaking of monkeying, our little over-achiever is trying to do everything his brother does...we are in for some trouuuble...