Gwen and Kingston's Cookie Choices

Gwen Stefani hands son Kingston James McGregor two boxes of Girl Scout Cookies — they chose Thin Mints and Trefoils! — while walking back to their car after a playdate at Griffith Park with Gwen’s parents and other family members on Saturday.

Kingston, who’s 2 ½, is definitely acting his age lately, Gwen told a radio station last week.

“[Kingston] is in that terrible twos. Gavin [Rossdale] calls him Sid Vicious. He [says], ‘You gave birth to Sid Vicious.’ I’m like, ‘Oops!’ He’s definitely got an attitude and Zuma is the opposite. He’s like this cool, laid back, easy-going guy — is that always how it is?”

Check out more pics of the family in their album, The Stefani-Rossdales!