July 20, 2010 11:00 AM

Splash News Online

Quality time with the grandparents!

Gwen Stefani drops 23-month-old son Zuma Nesta Rock off for an afternoon with her parents, Dennis and Patti Stefani, on Saturday in Los Angeles, Calif.

The singer, 40, then headed to the movies with husband Gavin Rossdale and elder son Kingston James McGregor, 4. Wonder what they saw?

RELATED: Family Photo: The Stefani-Rossdales Do Disney

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