The 5½-year-old and little brother Zuma, 3, ran around with their parents, climbing on a seal sculpture before checking out the monkey exhibit.
“When you have two little boys, you have to play outside. There’s no way around it,” the No Doubt frontwoman, 42, tells In Style.
“If we’re at the park, I try not to wear heels. The kids are so gigantic, it would be painful.”