Gavin Rossdale park Kingston Zuma Gavin Rossdale park Kingston Zuma

Looks like it was boys day out!

Gavin Rossdale and his sons Kingston and Zuma spent some time in the fresh air Saturday as Gwen's three men had some fun at a park in Brentwood.

The 47-year-old rocker usually shares the parental duties with wife Gwen Stefani but decided to go the solo route this time around. Guess the guys gotta work off that Thanksgiving weight too!