DISCOVERY DAYS
A celebration of inventors including the 309-year-old Benjamin Franklin. See electrifying performances by Franklin and Nikola Tesla. Take a trip through space in the Bell Museum's Exploradome, which highlights a variety of space inventions. (11 a.m.-4 p.m. Sat. $5-$7. Bakken Museum, 3537 Zenith Av. S., Mpls. 612-926-3878. www.thebakken.org.)
WINTER OPEN HOUSE
Learn how to strap on and use snowshoes. Also discover animal tracks and signs from self-guiding activities. A naturalist will be on hand to answer questions. (10 a.m.-3 p.m. Sat. Free, $5 snowshoe rental. Maplewood Nature Center, 2659 E. 7th St., Maplewood. 651-249-2000. www.ci.maplewood.mn.us.)
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