Celebrate National Engineering Week at the Disovery Museums. Different activities each day, including building roller coaster marble runs, a bridge out of simple household items, and creating structures out of uncooked spaghetti.
Feb. 18—22, 1 to 4 p.m. $11, infants under 12 months free. The Discovery Museums, 177 Main St., Acton. www.discoverymuseums.org.