Friday, September 13 

Backyard and Beyond: Forest Fridays. Discovery Museum, 177 Main St., Acton. 10-10:45 a.m. Enjoy a nature-based activity and a nature walk either in the Discovery Woods or out on the adjacent conservation land. Recommended for ages 2 to 6. Free with admission. Members free; nonmembers $14.50, ages under 1 free. discoveryacton.org.

Backyard and Beyond: International Rock Flipping Day. Discovery Museum, 177 Main St., Acton. 2-3 p.m. Walk through the conservation land to flip some rocks and explore the tiny and mysterious worlds underneath. Free with admission. Members free; nonmembers $14.50, ages under 1 free. discoveryacton.org.

Family Fun. Newton Free Library, 330 Homer St., Newton. 3-4:30 p.m. Families are invited for this space of quality time, featuring games, building, materials, and other activities for all ages. Free. newtonfreelibrary.net.

 

Leominster Food Truck Festival. Monument Square Historic District, Leominster. 5-9 p.m. Enjoy live music and dig into food from over two dozen vendors, including Mexican, Japanese, BBQ, ice cream cupcakes and more. Free. facebook.com.

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Saturday, September 14 

 

Touch-A-Truck. Auburn Mall, Rt. 12, Auburn. 10 a.m.-1 p.m. Truck lovers of all ages can interact with a variety of trucks, construction and public safety vehicles. Moonbounce and other kid-friendly fun. $5 per person, or $20 per family. facebook.com. 

 

Revere Beach Art Festival. Markey Bridge, Revere. 11 a.m.-4 p.m. Live art competitions, kids' activities, and local art to browse. Free. facebook.com.  

South Boston Street Festival. East Broadway between I & L St., South Boston. 11 a.m.-4 p.m. Join South Boston for our vibrant festival featuring entertainment, food, vendors, and more, during this celebration of family and community. Free. southbostonstreetfestival.com.

Douglas Farm & Orchard Apple Festival. 36 Locust St., Douglas. 12-8 p.m. Pick your own apples and peruse vendors, grab a snack from a food truck, and let kids enjoy a reading area, all set to live music by Holdin' Back band. $5 per person. facebook.com. 

The Lion King. Newton Free Library, 330 Homer St., Newton. 2 p.m. Sit back and enjoy this modern Disney animated classic following a young lion cub as he takes his place atop Pride Rock. Free. newtonfreelibrary.net.

Woody's Car Show. Woody's Auto Body, 324 Main St., Spencer. 4-8 p.m. Come see classic cars and hot rides and enjoy a variety of food and music. Free. facebook.com. 

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Sunday, September 15 

International Dot Day. Discovery Museum, 177 Main St., Acton. 11 a.m.-2 p.m. Celebrate creativity, courage, and collaboration, as we explore different techniques to make our own dot artwork. Free with admission. Members free; nonmembers $14.50, ages under 1 free. discoveryacton.org.

stART on the Street. Park Ave., Worcester. 11 a.m.-6 p.m. Central Massachusetts’ largest arts, music and performance festival featuring artists, crafters, food vendors, and family fun. Free. startonthestreet.org. 

Hispanic Heritage Month: Papel Picado. Boston Children’s Museum, 308 Congress St., Boston. 1-3 p.m. Make ‘papel picado’ or ‘pierced paper,’ a Mexican artform in which artists create patterns and images in colored tissue paper using chisel and small hammer. Free with admission. Members free; nonmember adults $18, youths 1-15 $18, ages under 1 free. bostonchildrensmuseum.org.

Sunday Concert. Newton Free Library, 330 Homer St., Newton. 2 p.m. Join the New England Philharmonic Chamber Players for an afternoon concert. Free. newtonfreelibrary.net.

Boston Area Chantey & Maritime Sing. USS Constitution Museum, Charlestown Navy Yard, Charlestown. 2-5 p.m. Listen, learn, and lift your voices as you participate in your maritime heritage by joining a rousing chorus of sea chanteys. Recommended donation: children $5-10; families $25-45. usscm.org.