The 36-year-old reality star and 32-year-old club promoter reunited to bring their two eldest children, 6-year-old son Mason and 3-year-old daughter Penelope, to Universal's Wizarding World of Harry Potter in Universal City, Calif.
Mason and Penelope enjoyed several rides, including Flight of the Hippogriff, at the park, which has yet to open to the public. Sources told E! News the pair also had a wand-fitting at a version of Ollivander's Wand Shop.
"Mason and Penelope were seen using their wand at several of the land's interactive windows," an insider said. Kardashian shared a photo of Penelope with the toy on Instagram, writing, "A little Harry Potter magic."
Kardashian and Disick were spotted again Saturday at Rob Kardashian's 29th birthday celebration with his family. The ex-couple have been spending a lot of time together recently, but Kardashian dismissed reconciliation rumors last week.
"By the way everyone relax, people that have three kids together spend time together," she told her followers on Snapchat.
Kardashian and Disick were together nine years before splitting in July and also share 15-month-old son Reign. The pair's friendly reunion at Wizarding World came just two days before Kardashian attended Justin Bieber's concert in Los Angeles.
"I'm being used. What can I say?" Bieber joked on The Bert Show in January after being linked to Kardashian in December.
Kardashian and her family will return on E! series Keeping Up with the Kardashians on May 1.