Travis Barker‘s on dad duty for a magical day out with his family … holding his toddler, Rocky, close to him while hanging at Disney’s Magic Kingdom!

The rocker was spotted at the popular Florida theme park Saturday afternoon … holding his little dude in his arms and basking in the late summer sun in Orlando.

Travis dressed casually in a white T-shirt and long black shorts … while Rocky’s dressed up in plaid overalls.

We’re told these two — along with Kourtney Kardashian and two other kiddos — had just finished up having a meal at the Pinocchio Village Haus restaurant, and they were on their way to the Peter Pan Flight’s ride … perfect for a youngin’ like the little Kar-Barker since it doesn’t have a height requirement.

Unclear how long the fam is planning to spend in the Sunshine State … but it’s a long weekend — and there are a ton of parks on the Disney property to explore.

It’s been an eventful summer for the fam … who enjoyed a day on the water recently, which ended with Kourtney getting a lesson from online parents.

Remember … Kourtney shared a pic of Rocky sleeping on her chest while on a boat — and, the internet freaked out because he wasn’t wearing a life jacket.

Kourtney thanked all the parents who kindly offered their advice … and, she even bought Rocky a new vest to avoid all the small chastisements.