Photos of Gwen Stefani, Kingston Rossdale, Zuma Rossdale at the Park; Gavin Rossdale Playing Tennis

Gwen Stefani was beaming with her boys at a birthday party in the park in Silverlake yesterday. Gwen shopped at Toys R Us before lunch in Echo Park and heading over to play ring-around-the-rosy and mingle while Kingston enjoyed the bouncy castle. Gavin spent the weekend in Florida at the Chris Evert Pro-Celebrity Tennis Classic, so unfortunately he missed out on the fun. Now that we've seen Zuma at the library and for his official debut, he's now a regular addition to the family fun with his big brother, who seems to be happily sharing time with mom.