By peoplestaff225
Updated February 17, 2009 07:00 PM

Whatcha laughing at? Gavin and Kingston Rossdale — enjoying a lollipop — found something funny on the way to the pharmacy in London on Monday, where they popped in to pick up some cough medicine before catching their flight back to Los Angeles later that day.

In addition to Kingston, 2 ½, Gavin, 43, and wife Gwen Stefani are also parents to son Zuma, 6 months this week.

See more of the family in their gallery, The Stefani-Rossdales!