Carnivals, block parties and fireworks... summer is officially here!

Friday, June 28 

Dirtopia. Discovery Museum, 177 Main St., Acton. 10:00 a.m.-2:00 p.m. Dig, climb, burrow, make mud pies and mud-paintings, and more with a giant pile of dirt and its infinite possibilities. Free with admission. Members free; nonmembers $14.50, ages under 1 free. discoveryacton.org.

Open Book, Open Play. The Eric Carle Museum, 125 West Bay Rd., Amherst. 10:30-11:30 a.m. Enjoy an interactive story-time followed by time to move, play, and explore materials. Recommended for ages 2-6. Free with admission. Adults $9, youths $6, ages under 1 free. carlemuseum.org.

Summer Friday Nights Free. Discovery Museum, 177 Main St., Acton. 4:30-8 p.m. Free admission to explore the museum. Food donations accepted for Open Table of Concord and Maynard and the Acton Food Pantry. Free. discoveryacton.org.

4th of July Block Party. Bay State Common, 600 Union St., Westborough. 5:30-9:30 p.m. Music, food, pony/hayrides, inflatables and more! Free. https://www.facebook.com/events/2274457472765939/

Millbury Lions Club 4th of July Carnival. Windle Field, Canal St., Millbury. 6-11 p.m. Rides, games, food and family fun at this annual summer celebration. Admission is free. millburylions.org. 

International Ocean Film Tour. The Regent Theatre, 7 Medford St., Arlington. 7:30 p.m. Celebrate the first week of Summer with a captivating presentation of the sea in all its diversity and beauty. $16. regenttheatre.com.

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Saturday, June 29 

Pop-Up Play Day. Berkshire Museum, 39 South St., Pittsfield. 10 a.m.-12 p.m. Build, rebuild, collaborate, and play across the colorful Imagination Playground filled with big blue blocks. Free with admission. Members free; nonmember adults $13, youths 4-17 $6, ages under 4 free. berkshiremuseum.org.

Dirtopia. Discovery Museum, 177 Main St., Acton. 10 a.m.-2 p.m. Dig, climb, burrow, make mud pies and mud-paintings, and more with a giant pile of dirt and its infinite possibilities. Free with admission. Members free; nonmembers $14.50, ages under 1 free. discoveryacton.org.

Play Date: Contemporary Explorations. Institute of Contemporary Art: Boston, 25 Harbor Shore Dr., Boston. 10 a.m.-4 p.m. Discover ways the ICA museum building is unique, throughs stories, adventure, and a time to create your own small-scale 3D building with your family. Free. icaboston.org.

Arms + Armor Demonstrations. Worcester Art Museum, 55 Salisbury St., Worcester. 11:30 a.m. & 2 p.m. Join this interactive program to learn about the arms and armor used by Roman soldiers, Medieval knights, and more. Free with admission. Members free; nonmember adults $16, ages 4-17 $6, ages under 4 free. worcesterart.org.

Northbridge Fireworks. Northbridge Middle School, 171 Linwood Ave., Whitinsville. 2-11 p.m. Food, fun, games, activities and more! Free. https://www.facebook.com/events/2373425352715492/

Millbury Lions Club 4th of July Carnival. Windle Field, Canal St., Millbury. 6-11 p.m. Rides, games, food and family fun at this annual summer celebration. Admission is free. millburylions.org. 

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Sunday, June 30 

Dirtopia. Discovery Museum, 177 Main St., Acton. 10 a.m.-2 p.m. Dig, climb, burrow, make mud pies and mud-paintings, and more with a giant pile of dirt and its infinite possibilities. Free with admission. Members free; nonmembers $14.50, ages under 1 free. discoveryacton.org.

Fourth of July Fireworks & Parade. Town Common, Sutton. 3-10 p.m. Sutton celebrates the Fourth of July with an array of festivities. A kid's area, food trucks and historical presentations and walking tour starts at 3 p.m. and the parade takes off at 4 p.m. Live music starts at 5 p.m. and fireworks light up the sky at 9:30 p.m. millburysutton.com. 

Millbury Lions Club 4th of July Carnival. Windle Field, Canal St., Millbury. 6-11 p.m. Rides, games, food and family fun at this annual summer celebration. Admission is free. millburylions.org.