This week, it’s safe to say Boston’s hot — in scorching temperatures and loads of free things to do around the city. Check out a local iced coffee class, a free fashion show, and the oldest Latinx festival in Boston. Plus, conduct your own orchestral masterpiece at a block party.

BUILD UP The Museum of Fine Arts is bringing in certified Lego Master Model Builders to help you tap into your creativity. The Lego Discovery Center will host this family-friendly event with guided workshops to make Lego creations based on the museum’s “Hallyu! The Korean Wave” exhibit. These 30-minute workshops are first come, first served.

July 15, noon to 5 p.m. Free with admission.

Ruth and Carl J. Shapiro Family Courtyard at the MFA, 465 Huntington Ave. mfa.

org Advertisement PUT YOUR STAMP ON SUMMER Siobhan Mahaney of Weston’s Spellman Museum of Stamps and Postal History is coming to The Boston Public Library’s Faneuil Branch to provide a lecture geared toward adults. As an educational consultant, Mahaney will reveal stamps’ historical and cultural insights, and how to get into stamp collecting as a hobby. July 16, 6 to 7 p.

m. Free. BPL, Faneuil Branch, 419 Faneuil St.

, Brighton. bpl.org CONDUCT YOUR MASTERPIECE Midweek, Boston Landmarks Orchestra hosts its Community Block Party on the banks of the Charles.

Four Strings Academy, a multicultural classical music program, and HONK!, which hosts activist street bands in its annual festival, will perform. Attendees can try their han.