Pete Wentz took his son Bronx out for a day of celebration in honor of the little one's…
Wait for it…
Well, he's only four years old!!!
Woah!! When did he grow up??? Seems like just yesterday he was poppin' out like its hot, and now he's almost been around for half a decade. Time flies by when you're having fun!
And judging by these pictures - these folks were having plenty of that!
P.S. Check out way more pictures way down (below) !!!
[Image via WENN.]