An Apple Blossom Festival, a 'Cake Walk,' the Trustee's annual Home Sweet Home Day and more.

Friday, May 17 

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

Toddler and Preschool Play Series: Materials Play. Eric Carle Museum of Picture Book Art, 125 West Bay Rd., Amherst. 11-11:30 a.m. Experiment with materials selected especially for young explorers, in the Art Studio. Free with admission. Adults $9, youths $6, ages under 1 free. carlemuseum.org.

Family Fun. Newton Free Library, 330 Homer St., Newton. 3-5 p.m. Drop-in for family fun with games, building materials, and other activities for all ages. Free. newtonfreelibrary.net.

Berklee City Music Singer-Songwriter Concert. Berk Recital Hall, 1140 Boylston St., Boston. 4 p.m. Berklee City Music presents a singer-songwriter concert featuring high school students. Free. berklee.edu/events.

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Saturday, May 18 

Apple Blossom Festival. Sholan Farms, 1125 Pleasant St., Leominster. 10 a.m. Celebrate the advent of spring in Central Massachusetts featuring crafters, children’s activities, music, and food. Price varies. sholanfarms.com.

Pop-Up Play Day. Berkshire Museum, 39 South St., Pittsfield. 10 a.m.-12 p.m. Build, rebuild, collaborate, and play on the big, blue blocks of Imagination Playground. Free with admission. Members free; nonmember adults $13, youths 4 and up $6, ages under 4 free. berkshiremuseum.org.

Endangered Species Super Hero. Franklin Park Zoo, 1 Franklin Park Rd., Boston. 10 a.m.-4 p.m. Meet some of your favorite Super Heroes and learn how you can be a Super Hero for endangered species during Franklin Park Zoo’s Party for the Planet. Free with admission. Members free; nonmember adults $16.95, ages 2 to 12 $11.95, ages under 2 free. zoonewengland.org.

Home Sweet Home Day. Trustees historic home, various locations. 10 a.m.-4 p.m. Home Sweet Home Makers, Masters & Craftsman takes place at eight Trustees historic sites which generally charge admission a few of which are only open to the public a few times each year. From grand mansions to humble colonials to mid-century modern masterpieces, the historic houses of the Trustees all have a story to tell. Free. thetrustees.org. 

MFA Playdates: Growing from the Ground.Museum of Fine Arts: Boston, 465 Huntington Ave., Boston. 10:15-11 a.m. Enjoy story time and looking activities in the galleries following artmaking. Take inspiration from the new growth of springtime. For ages 2 to 4. Free with admission. Members free; nonmember adults $25, youths 7 and up $10, ages 6 and under free. mfa.org.

Family Yoga Class. Newton Free Library, 330 Homer St., Newton. 10:30-11:30 a.m. Learn and participate in cooperative games, age-appropriate poses, caregiver-child poses, breathing exercises, and simple mindfulness activities. Designed for ages 3 to 12. Free. newtonfreelibrary.net.

Arms + Armor Demonstrations. Worcester Art Museum, 55 Salisbury St., Worcester. 11:30 a.m. & 2 p.m. A fun interactive program, learning all about different kinds of arms and armor used by Roman soldiers, Medieval knights, and beyond. Free with admission. Members free; nonmember adults $16, youths 4 and up $6, ages under 4 free. worcesterart.org.

World Fiddle Day. Fruitlands Museum, 102 Prospect Hill Rd., Harvard. 12-4 p.m. Celebrate the fiddle during this folk music celebration throughout the afternoon. Free. fruitlands.org.

The Lego Movie 2: The Second Part. Newton Free Library, 330 Homer St., Newton. 2-4 p.m. Join Emmet and all his Lego friends are they reunite for a whole new animated adventure. Free. newtonfreelibrary.net.

Happier Family Comedy Show. The Eric Carle Museum of Picture Book Art, 125 West Bay Rd., Amherst. 3-4 p.m. Creativity flourishing during this created-on-the-spot family friendly improvisational show. Recommended for ages 5 to 12. Member adults $9, youths $4.50; nonmember adults $10, youths $5. carlemuseum.org.

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19 Sunday

CakeWalk. Lasell College Athletic Field, 1844 Commonwealth Ave., Newton. 9 a.m.-12 p.m. The signature fundraising event for Birthday Wishes, this family-friendly 5K and Fun Run concludes with a festival of activities including live music, bounce house, kids' games, balloon sculpting, face painting, and, of course, cake! $35 per person. birthdaywishescakewalk.org. 

Waban Village Day. Waban Library Center, 1608 Beacon St., Waban. 10 a.m.-3 p.m. Enjoy music from Mark Copeland’s Contemporary Gospel Band, the Suzuki Music School, and Newton Family Singers, alongside pizza, ice cream, rides and games for kids of all ages, and more. Free. wabanimprovement.org.

Touch-a-Truck. Worcester JCC, 633 Salisbury St., Worcester. 11 a.m.-3 p.m. Kids of all ages can explore their favorite trucks and vehicles up close. Plus, food trucks, face painting, crafts, pet alpacas, train rides on the roaming railroad and more.