Keeping their looked comfy, Kelly rocked a set of blue sweats along with some white Converse sneakers while the Jennifer's Body actress, 34, flashed her rock hard abs in a cropped black tank top and white sweatpants, both adorned with graphic eye motif and black high-top sneakwe by Rick Owens.
The couple and the kiddos were all masked up as they did their part to stay safe during the ongoing COVID-19 pandemic.
Scroll through the gallery below to see more photos of the couple and the kids out at Universal Studios.
During their fun day at the theme park, the blended family spent some time in the Harry Potter area where the kids picked up some wands. The musician, real name Colson Baker, also picked up a couple of things in The Simpsons area of the park.
The "Bloody Valentine" rapper seems more than willing to step into the role of stepdad. A source previously spilled to OK!, "MGK is head over heels in love with Megan, and he feels like he's only sharing half of her life. He wants to spend time with the boys and have them join him and Megan to go to the park, the zoo, and do family things."
Before hooking up with Kelly last spring, Fox was previously married to Beverly Hills, 90210 alum Brian Austin Green for ten years. The two share custody of their three sons.