Tori Roloff 'Can't Believe' Son's Latest Milestone in Exciting New Photo

It's back-to-school season for everybody—including reality TV stars.

Tori Roloff , from TLC's Little People, Big World , is sending her 7-year-old son Jackson off to second grade this week, and just like parents everywhere, the mother-of-three can't get over how quickly her oldest son is growing up.

On Tuesday, Sept. 3, Tori shared a pic of Jackson on Instagram on his first day of school, and fans were quick to show their support.

"Here we are… the first day of SECOND GRADE," Tori wrote in her caption. "I just can’t believe it. I love this kid so much and I’m so proud of him and everything he does. I know he’s going to rock 2nd grade. This summer has been so wonderful and I am so sad to see it go, but so excited to see where Jackson goes! Happy 1st day of 2nd grade!"

Related: 'Little People, Big World' Fans Swoon Over 'the Way Zach Looks at' Wife Tori Roloff in New Video

Fans raved about the cute pic, with some pointing out how much Jackson resembles his dad, Zach .

"He looks just like Zach!" one Instagram user wrote.

"Why is he the coolest kid ever?!?" asked another commenter.

"He is seriously so handsome!! Hope he had a great day!!" commented a third person.

Along with Jackson, the doting parents share Lilah , 4, and Josiah , 2.

While Jackson might be spending most of his days in a classroom from now on, it seems that he and his siblings got the most fun they could out of summer vacation. Earlier this month, Tori shared pics and video from a camping trip they took with her dad where the kids got to go fishing, splash in the water, play games, and enjoy nature.

"Impromptu camping trips with grandpa are the best!" she captioned her post.

While Zach and Josiah stayed behind, the older kids apparently had a blast.

"This was a super last minute trip and Zach decided to stay home with Josiah who isn't quite ready for camping!" she wrote on a photo of Jackson and Lilah. "Lilah keeps asking why we can't stay any longer? 🤣."

Next: ‘Little People, Big World’s Tori Roloff Debuts Style Change Fans Say Make Her Daughter Lilah’s ‘Twin ’