Gwen Stefani kingston zuma
Gwen Stefani kingston zuma

Don't mess with these bad boys!

Taking advantage of some time off from mom Gwen Stefani, Kingston and Zuma spent the day riding bikes and scooters, discovering nature, and generally hamming it up for the cameras in LA, on Saturday afternoon.

We particularly love how Kingston's learned to throw up a peace sign -- what a little gangster!

These boys' nanny definitely has her hands full!

Gwen Stefani kingston zuma