Nicole Richie and Joel Madden headed to a park in LA Saturday with their well-dressed toddlers, Harlow and Sparrow. Harlow sprinted toward the jungle gym in one of her ballerina tutus before testing out the swings with help from Joel. Sparrow hung with Nicole on a teeter-totter and explored a sandbox while showing some pride for the Phillies, who are based not far from Joel's Maryland hometown. The foursome were joined by family friend and Grey's Anatomy star Ellen Pompeo as well as her daughter, Stella. It was a fun afternoon for busy parents Nicole and Joel. Nicole's been hard at work on her House of Harlow and Winter Kate lines, while Joel's prepping to hit the road again with Good Charlotte over the Summer in Indonesia.