WINTER OUTDOOR ADVENTURE EXPO: More than 90 presentations and programs on winter outdoor activities, plus exhibits. 11 a.m.-5 p.m. Free. Midwest Mountaineering, 309 Cedar Av. S., Mpls. 612-339-3433. MACY'S 47TH ANNUAL SANTALAND: "A Day in the Life of an Elf." Animated display tells the story of Santa's helpers at the North Pole as they prepare for Christmas. 10 a.m.-8 p.m. Free. Macy's, 700 Nicollet Mall, Mpls. 612-375-2200. CRITTERS UP CLOSE: Meet reptiles and amphibians and learn about their habitats, how they live and eat. 3-4 p.m. today. Free. Eastman Nature Center, Elm Creek Park Reserve, 13351 Elm Creek Rd., Dayton. 763-559-6700. www.threeriversparkdistrict.org.WOOL ORNAMENT MAKING: Craft an ornament from Gale Woods sheep wool. Leave with the ornament and the skills to make more. Reservations required. 1-4 p.m. $30. Gale Woods Farm, 7210 W. County Rd. 110, Minnetrista. 763-559-6700. www.threeriversparkdistrict.org.NICKELODEON UNIVERSE: Seven-acre indoor theme park with 30 rides and attractions. 10:30 a.m.-7:30 p.m. Unlimited-ride wristband, $29.95. Mall of America, Interstate 494 and Cedar Av. S., Bloomington. www.nickelodeonuniverse.com.BODIES - THE EXHIBITION: A close look inside specially preserved human bodies, showing the intricacies of muscle, bone, skin, circulatory and other systems. 11 a.m.-7 p.m. $14-$22. Mall of America, Interstate 494 and Cedar Av. S., Bloomington. www.bodiestheexhibition.com.