In these tough economic times, investment dressing takes on a whole new meaning. If you’re in it for the long haul, consider the latest kiddie couture from Peter Som. Made with the same exquisite details as his adult collections, the party pieces for boys and girls can be passed on to the next generation. The navy velvet tux features grosgrain trim, a festive print lining, and velvet-covered buttons. A periwinkle organza frock — with taffeta sash and metallic French lace overlay, natch — is perfection. And in the current market, you can consider both a safe bet. Best & Co., at Bergdorf Goodman, 754 Fifth Avenue, between 57th and 58th Streets, seventh floor (212-872-8847 or bestandcompany.com). SEA Intrepid What: The ship returns to her NYC home with a new hangar deck and interactive exhibits. Why: It’s high tide. When: Opening weekend, Sat., 10 a.m.-8 p.m.; Sun., 10 a.m.-6 p.m. Where: Intrepid Sea, Air & Space Museum, Pier 86, W. 46th St., at Twelfth Ave. (212-245-0072). HEAR Lolli-Pops Concert by The Little Orchestra Society What: Pots, pans, and hands make great music. Why: Get down to Gershwin. When: Sat., 10:30 a.m. & noon; Sun., 1 & 2:30 p.m. Where: The Kaye Playhouse at Hunter College, E. 68th St., b/t Park & Lexington Aves. Tickets at 212-772-4448. DANCE Family Dance at BAX What: Toddlers explore many forms of movement with fun props and great music. Why: Kids can-can. When: Thru Dec. 20. Sat., 10:30-11:15 a.m. Where: Brooklyn Arts Exchange, 421 Fifth Ave., at 8th St., Park Slope (718-832-0018).