A source tells PEOPLE Kourtney Kardashian was joined by Kris Jenner and Kanye West on the fun-filled day
Credit: Kourtney Kardashian/Instagram

One thing’s for sure: The Kardashians love to spend their birthdays at Disneyland!

On Monday, Kourtney Kardashian took her kids to the theme park in Anaheim, California, to celebrate her sons’ shared birthday as Mason turned 6 and Reign turned 1.

A source tells PEOPLE Kardashian also brought her daughter Penelope, who celebrated her 3rd birthday at Disneyland this summer, as well as brother-in-law Kanye West and his daughter North, 2, momager Kris Jenner, 60, and her boyfriend Corey Gamble, 35, plus several family friends.

Kardashian “spent several hours at the park with her kids, family and friends,” says the source of the family’s fun-filled day.

“They went on many attractions, including the King Arthur Carrousel, the Mad Tea Party ride and It’s a Small World cruise,” the source adds.

On Monday evening, Kardashian, 36, shared a picture of herself and two pals on Instagram, posing with their backs to the camera with their hands forming the letters of the word “LOVE.”

“L O V E @disneyland,” Kardashian captioned the snapshot.

Though Kardashian’s ex Scott Disick was apparently not present for the Disneyland festivities, the former couple has recently been spending more time together and as a family with their three kids as he works on his sobriety.

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A source close to Kardashian told PEOPLE earlier this month that the mom of three has been “taking it one day at a time” and is “starting to trust” Disick more since the 32-year-old was spotted spending time with another woman in July, prompting Kardashian to end their nine-year relationship.

“Scott knows he has to focus and work hard every day to keep his promise to his family,” the source added. “He wants to be a family with Kourtney and the kids.”

On Monday, Kardashian took to her website and app to celebrate her birthday boys: “It is still crazy to me that I have two boys born on the same exact day,” she wrote. “I really tried to not have it happen, so they could each have their day, but there was no way around it. It is truly so special and meant to be. Happy birthday to the coolest and sweetest boys I know!!!”