Credit: Instagram

The 16 and Pregnant kiddos are growing up so fast, y'all! It's hard to believe that just a few years ago this crop of cuties were making us aww as babies on MTV, and now they're starting their first days of kindergarten — and, in the case of Maci Bookout's son, Bentley they're also professional dirt-bike riders.


Credit: Maci Bookout on Instagram

Benny From the Block has probably grown and changed more than any of the Teen Mom tots (read: dirt bike rider), and this little dude started his first day of big kid school on August 11.

Maci took to Instagram to share a picture of her little man cheesing for the camera along with the caption, "My baby on his first day of kindergarten! ohmy," and it looks like girlfriend was an emotional wreck throughout the entire experience.

"I seriously thought I could make it through the first day kindergarten without a melt down," Maci tweeted after dropping her kiddo off. "LOL I didnt even make it out of the parking lot."

It's no surprise that Maci's feeling emotional — her baby is growing up so fast! Before we know it, Bentley will be graduating elementary school and moving on to high school, where he'll be the same age Maci was when she became pregnant with him! Sigh, kids these days...

Can you believe Bentley's already in Kindergarten? Take to the comments!