My son recently turned 4.  It's hard to watch him grow up so quickly.
My son had his 4th birthday a couple of weeks ago.
user
How did it go? What'd you get him for a gift?
assistant
He got a remote control excavator, and had a lot of fun at his party.  It's crazy how fast he's growing up, though.
user
It seems like all those years just flew by, huh. At least now he's getting old enough to start remembering all these great times!
assistant