Lego Weekend: Build Lego Marine Animals, March 7 and 8, 10 a.m.-5 p.m., Maritime Aquarium, 10 N. Water St., Norwalk. Lego experts from Play-Well TEKnologies will be on hand. Cost: $19.95-$26.95. Info: maritimeaquarium.org.
Help Locate Liam the Library Leprechaun, March 9-17, Wilton Library, 137 Old Ridgefield Rd., Wilton. Free. Info: 203-762-3950, wiltonlibrary.org.