The 44-year-old actor was spotted enjoying the rides with his kids and also interacted with fans, reported People magazine.
"The kids love spending time with their dad and vice versa," a friend of the actor told People magazine.
One of the onlookers, who rode "It's a Small World" with Affleck, noted the actor was wearing a Batman backpack.
The source, however, did not specify which of his kids - Violet, 11, Seraphina, 7, and Sam, 5 - accompanied him to the amusement park.
The "Superman v Batman" star even stopped to pose for a photograph with a fan's young daughter, who also tweeted about meeting Affleck.