Blake Shelton, Gwen Stefani and her kids looked like one big happy family over Labor Day!

The blonde beauty and her three children — Kingston, 10, Zuma, 8, and Apollo, 2 — reunited with the country crooner in his home state of Oklahoma for a weekend of fun, which included plenty of time spent on the 40-year-old's boat.

MUST SEE: Blake Shelton and Miranda Lambert Avoid an Awkward Run-In at the ACM Honors!

Gwen, 46, documented the gang's adventures on Snapchat, sharing a video of Apollo helping to steer as the other boys played on an inflatable raft.

gwen stefani snapchat
Snapchat

As Life & Style previously reported, the duo — who met on the set of The Voice — are secretly engaged and planning a Christmas wedding at his ranch.

"Gwen and the boys love it there and it will give them a lot of privacy,” an insider revealed. “Blake wants it to be really special, to show them coming together as a family.”

Scroll through the gallery below to see Gwen and Blake's cutest photos together!