Somerville's OPENAIR Circus, which teaches circus skills to children, teens and adults, is holding its big-top performance this weekend. Under a tent at Nunziato Field near Union Square, you'll be able to see kids juggling, walking on stilts, performing acrobatics and more. There are performances Friday (7 p.m.), Saturday (2 p.m. and 7 p.m.) and Sunday (2 p.m.). . See our .
Film artists and animators will show off work at the annual Glovebox Short Film and Animation Festival. It takes place Saturday starting at 2 p.m. at .
Fourth Annual Metro Mayors Basketball Tournament on Saturday
The Metropolitan Area Planning Council sent the following about the basketball tournament, taking place in Somerville on Saturday: "Law enforcement officials, youth services workers and local teens will join together for the Fourth Annual Metro Mayors Basketball Tournament … in a show of solidarity among youth and those who fight for their safety. Cambridge, Chelsea, Everett, Malden, Quincy, Revere, Somerville and Winthrop will send teams to a five-on-five tournament hosted by the Metro Mayors Coalition as a way to promote safe summer activities and kick off the coming school year."
The tournament takes place from 9:30 a.m. to 1:30 p.m. at . There will also be lunch and a dance performance. If it's raining, the tournament will be at .
Spend some time canoeing on the Mystic River while removing water chestnuts, an invasive species. Canoeing begins at 9 a.m. Saturday at 32 Shore Drive. Canoes are provided, but you can also bring your own boat. Register here.
Ever wanted to grow your own mushrooms? Learn how with the as part of its Urban Agriculture Skill-Building series. The mushroom lesson begins at 10 a.m.
Free museums: MFA, Harvard Museum of Natural History
As part of the "Museums on Us" program, Bank of America cardholders can get into the Museum of Fine Arts, the Harvard Museum of Natural History and some other museums in Massachusetts on Saturday and Sunday. Learn more here.