Rubber Ducky Extravaganza. Discovery Museums. 177 Main St. Acton. 10:00 a.m. to 12:00 p.m. Come celebrate as we wrap up the Museums’ 25th year with duck quackers, duck stories, and fun facts about ducks. Special rubber ducks will be available for purchase with the fundraising proceeds supporting the renovation of our Water Room. $9. 978-264-4200. www.discoverymuseums.org.