Every Sat. & Sun. (except Dec. 3) through Dec. 17. Hands-on 20-minute family-oriented demos for age 5+. “Cow Eye Dissection” (11 a.m.) explores the parts of the eye and how they work together. “Out of the Water and Back Again: A Whale’s Tale” (3 p.m.) explores the amazing evolutionary histories of whales and other creatures. Various times, MNH, 1105 North University. Free. 764–0478.