Little cups runneth over.
TASTE
Sweet Cupcakes in Harvard Square
What: The Back Bay bakery opened its second sugary spot this week.
Why: Organic carrot with crushed pineapple! Madagascar vanilla with buttercream frosting! Pupcakes, too!
When: Mon. & Tues., 11 a.m.-7 p.m.; Wed.-Sat., 11 a.m.-10 p.m.; Sun., noon-7 p.m.
Where: 0 Brattle St., Cambridge (617-547-2253).
SLURP
B&G Oysters Patio Opening and Oyster Invitational
What: Local chefs and the world’s fastest shucker participate in a series of shellfish-centric competitions. Sample beers, B&G’s small plates, and unlimited bivalves from Island Creek and Cotuit.
Why: A mother-shucking good time.
When: Sun., noon-8 p.m.
Where: 550 Tremont St. (617-423-0550).
STROLL
MayFair in Harvard Square
What: Award-winning street fair with more than 200 merchants, grilling competitions, hot-air balloon rides, and five stages of live music and dance.
Why: Fair play.
When: Sun., noon-6 p.m.
Where: Six blocks surrounding the Harvard Square T stop.
SPY
Somerville Open Studios
What: Hundreds of local artists show their stuff in traditional (studios, galleries) and untraditional (garages, churches, cocktail lounges) spaces throughout the city.
Why: See how the artistic half lives.
When: Sat. & Sun., noon-6 p.m.
Where: Locations at somervilleopenstudios.org.
SAVOR
Taza Chocolate Open House & Factory Tour
What: See what it takes to make the sustainably produced Mexican-style chocolate and taste to your heart’s content.
Why: Muy bueno.
When: Ongoing tours, Sat., 10 a.m.-6 p.m.
Where: 561 Windsor St., Somerville (617-623-0804).