You dream of a body double to fold the laundry (while you breastfeed) and answer the door (while you finish bath time).But even a finely tuned clone couldn’t do the job of Alter Ego Concierge. The new biz pairs you with nannies, babysitters, house cleaners, personal chefs, errand runners, and other domestic saviors that lighten your load.Owner Caitlin Hofherr is meticulous in sourcing the full- or part-time help you need (for every 50 candidates she interviews, only about ten make it into her network). After matchmaking (complete with a 90-day guarantee), she helps negotiate salaries, draft contracts, and write household manuals.The company also provides special someones for quickie tasks like decorating birthday parties, grocery shopping, or even driving the kids to Little League. So your only job is to sit back and relax.Alter Ego Concierge (312-802-2337 or alteregoconcierge.com). Rates start at $20 per hour for temporary jobs (two-hour minimum); negotiable for long-term help.We have lots more to say (and know you do, too). Join our playgroup on Facebook for giveaways, deals, and more.BUILDLego Games TourWhat: Step into a life-size model of the classic Lego game Minotaurus, in which you roll dice and jump over “hedges” in a race to the end of a maze.Why: Compete against other families to win prizes, including a trip.When: Sat. & Sun., 10 a.m.-6:30 p.m.Where: Lincoln Park Zoo, 2200 N. Cannon Dr., at Fullerton Ave. (312-742-2000). Admission is free.ROMPEcofriendly Play SpacesWhat: Learn to live greener at the open house/hands-on workshop run by pros from Colori Eco Paint Boutique, The Green Mama, The Land of Nod, and more.Why: Fun comes naturally during the kids’ art lessons from Go Get Your Smock.When: Sat., 10 a.m.-5 p.m. (Art lessons, 11 a.m.-4 p.m.)Where: Colori Eco Paint Boutique, 2243 W. North Ave., at Bell St. (773-252-4923). R.S.V.P. online at colorichicagoevent.pingg.com. Admission is free.PLAYOak Street Council’s Saturday Music SeriesWhat: A string quartet and kid musicians from New Music School perform a free outdoor concert.Why: The instrument petting zoo, where future maestros can manhandle string, brass, and wind instruments.When: Sat., performance, 1-3 p.m.; petting zoo, noon-4 p.m. (Also Aug. 21; Sept. 4 & 18.)Where: Esquire Theater, 58 E. Oak St., b/t Rush St. & Michigan Ave. Admission is free.Photo: crimfants / FlickrUp to 50% off BaciniThe gals behind famed L.A. boutique Satine have captured the romance and ease of Italy in their lingerie line, Bacini. The demure delicates are up to 50% off today on Swirl.