The Poosh founder and the Blink-182 drummer welcomed their son Rocky together in November 2023

Kourtney Kardashian Barker and Travis Barker’s son is growing up!

On Tuesday, Feb. 11, the Poosh founder, 45, shared several pictures on Instagram, including an adorable photo of the pair’s youngest son Rocky, 15 months. In the photo, the toddler can be seen walking on the beach holding both Kardashian Barker and Barker’s hands.

The little boy rocks a full head of brown hair as he strolls on the sand wearing a red and yellow sweatshirt. Kardashian Barker simply captioned her gallery post with a love letter emoji.

The couple has a blended family with each star having three 𝘤𝘩𝘪𝘭𝘥ren from previous relationships. Kardashian shares Mason, Penelope and Reign with her ex Scott Disick, while Barker is father to his son Landon, daughter Alabama and his stepdaughter Atiana, all of whom he shares with ex-wife Shanna Moakler. The pair welcomed their son Rocky together in November 2023.

“I love the idea of a blended family. I think that the more kids, the merrier. You have all these siblings and more people to love. It’s a beautiful thing,” Kardashian Barker said during the season 2 finale of The Kardashians.

While both Kardashian Barker and Barker are used to being in front of a camera, the most adorable moments are the ones they share with their 𝘤𝘩𝘪𝘭𝘥ren. They are often the stars of adorable TikTok videos, doing everything from trendy lip syncs and family challenges.

“We usually get like suckered into those things, but it’s pretty funny,” he told PEOPLE, referring to the TikToks that his 𝘤𝘩𝘪𝘭𝘥ren get him and his wife to record.

In an exclusive interview with PEOPLE after his Run Travis Run 5K in New Orleans, the Blink 182 drummer recently revealed that Rocky is already starting to drum and that he’s playing the instrument “constantly, 24/7.” Barker said that as his 𝘤𝘩𝘪𝘭𝘥ren continue to grow, he hopes he and his wife can “just lead by example,” as they develop.

“I hope we just lead by example,” Barker told PEOPLE. “I mean [Rocky], he just turned 15 months today, and he’s like already playing drums and guitar and everything, so I feel like all we can do is steer them.”

“I think you’re 𝐛𝐨𝐫𝐧 with like this DNA of who you are, but, like, we could always be there to just, you know, lead them in the right direction,” he added, sharing that he also plays guitar.