Time flies when you’re having fun! Just ask new mama Tori Roloff! It seems like just yesterday her son, Jackson, was born — so it’s hard for us (and fellow Little People, Big World fans) to believe that he’s already four-months-old! Tori celebrated the big occasion by sharing his impressive milestones — check out the video to see for yourself!

The Roloff family has a lot to celebrate! Grandma Matt Roloff recently penned his first children’s book, which he dedicated to Baby J, who happens to be his first grandchild. The celebrations didn’t end there, as earlier this week, Audrey and Jeremy welcomed their baby girl named Ember. They couldn’t help but marvel at the arrival of Jackson’s first cousin.

“She’s beautiful,” the new parents gushed. “We are feeling so thankful and blessed that God has entrusted us with this little life. We are excited for the journey of parenthood that lies ahead. Welcome to our family Ember, may you be a glowing, fierce, and radiant light in this world.”

We can’t get enough of this perfect little family. And we can’t wait to see all of Jackson and Ember’s bonding to come!