Report from the FBI, Munchkin Unit (highly classified)Mission: Have a child infiltrate a fancy French restaurant. Successfully.Test site: Aigre Doux, near Merchandise Mart.Activity: Upon entering, Special Agent Small Fry and his parents ask about the secret, off-menu meals for tots ages 12 and under. Server explains that choices range from organic carrot soup to turkey meatballs. Acting on a tip, parents ask if Fry can visit the kitchen to watch chefs Malika Ameen and Mohammad Islam prepare his meal. Server seats Fry in a red plastic chair behind the chefs, who offer to let him roll his own pizza dough.Summary: Mission accomplished — and it’s all too good to keep under cover.Aigre Doux, 230 West Kinzie Street, between Franklin and Wells Streets (312-329-9400 or aigredouxchicago.com).PLAYWicker Park Fest What: The street fest’s tent for tykes has punk-rock hairstyling, live music by Little Miss Ann, make-your-own band tees, and more.Why: You know where to park it.When: Sat. & Sun., noon-6 p.m.Where: Milwaukee Ave., at North Ave. (773-384-2672).PUSHBurnham ParkWhat: Coast on the lakeside skateboard park’s concrete bowls, raised berms, and platforms; stunts welcome.Why: Ramp up the fun.When: Daily, 6 a.m.-11 p.m.Where: 3100 Lake Shore Dr., at 31st St. (773-256-0949).BROWSEGreenheart Shop What: Ecocentric boutique unveils a new Wicker Park location crammed with fair trade puppets, wooden toys, organic cotton onesies, and more.Why: Baby shower shopping made easy.When: Mon.-Fri., 11 a.m.-7 p.m.; Sat., 11 a.m.-6 p.m.; Sun., noon-5 p.m.Where: 1911 W. Division St., b/t Wolcott & Winchester Aves. (312-264-1625).