Kids Halloween events: Pumpkin Party for Kids and Families from 11 a.m. to 2 p.m. Saturday at Commonwealth Restaurant & Market, 11 Broad Canal Way, Kendall Square, for $10 per person; Kids Halloween Festival from 1 to 3 p.m. Saturday at The Harvard Coop, 1400 Massachusetts Ave., Harvard Square, for free; Costume Build Day, also from 1 to 3 p.m. Saturday at Parts and Crafts, 577 Somerville Ave., Somerville (between Porter and Union squares), for a suggested donation of $15, or $10 for members.

The Commonwealth Restaurant & Market pumpkin party for kids and families has  games such as bobbing for apples, a costume contest for prizes and time to paint and decorate pumpkins that can be taken home – and Stephanie Cmar of Stacked Doughnuts will be on hand frying up treats (while supplies last) to go with Commonwealth hot chocolate and warm cider. (Other food and fall cocktails for adults will be offered.) Information is here.

The Coop party, meant to provide kids 8 and younger with free games, crafts, pumpkin decorating and other such events, takes place outside on Palmer Street or, if there is rain, on the lower level of the book building. Call (617) 499-2000.

Parts and Crafts, a nonprofit makerspace, offers a fun atmosphere – but not a party – so people can work on Halloween costumes. Bring a half-finished costume, bag of supplies or just an idea and find tools, sewing machines, workspace, supplies and enthusiastic amateur advice and support to get it finished. Call (617) 207-8016.

Somerville Food Day from 1 to 4 p.m. Saturday at the Mystic Learning Center, 530 Mystic Ave., Somerville.

Who doesn’t love food? Exactly. But Food Day takes it to the next level, with features including: sales of fresh, organic produce at low prices; food mapping to track food resources; a recipe swap; hands-on lessons about harvesting vegetables and growing and composting at home; live music; children’s activities such as face painting and the Somerville Arts Council’s Muscrat art bus; and a raffle to give away Taza Chocolate and tours, stays at the Holiday Inn, Whole Foods Market gift cards, restaurant discount cards and more. Information is here.

“Tomes of Terror: Nevermore” radio play from 5 to 7 p.m. Saturday and Sunday at Responsible Grace Church, 204 Elm St., near Davis Square, Somerville. Tickets are $15 ($16.52 with an online advance service fee), or $12 for students and seniors ($13.41 with a service fee) or you can just reserve tickets here and pay at the door without a service fee.

The Post-Meridian Radio Players’ annual Halloween show includes Edgar Allen Poe classics “The Raven” (of course), “The Masque of the Red Death,” “The Fall of the House of Usher” and “The Cask of Amontillado” performed in the style of golden-age radio – with actors in front of microphones and sound effects created live on stage. Creative and retro candies and sodas will be available at the shows, which run through Nov. 1. (The Halloween night performance includes a costume contest.) Information is here.

The Armory of Horror haunted experience from 6 to 10 p.m. Saturday and Sunday at The Center for Arts at the Armory, 191 Highland Ave., Somerville. Tickets (via the irritating Living Social) are $20 for adults or $12 for kids or can be bought at the door (where there’s a $15 Somerville residents special).

The main Hall of the Armory becomes a haunted maze full of ghosts, ghouls and demons led by Matthew Martino, a local who has worked at scare shows such as Spookyworld, Castle of the Damned and Horrorville. Events run through Nov. 1, and in addition to the big haunted maze, there will be a family day for kids with less scary special activities, as well as a special “lights on” backstage tour showing the secrets behind making a haunted house. Information is here.

https://www.youtube.com/watch?v=aHUBlv5_K8Y

“Guardians of the Galaxy” at 7 and 10 p.m. Saturday at the Massachusetts Institute of Technology’s Building 26-100, also known as the Compton Laboratories, at 60 Vassar St. Admission is $4.

This Marvel Universe film took characters with a low public profile and put them into a film with few real stars and made $400 million worldwide anyway, prompting jokes that Marvel can now do pretty much anything and still make money. People loved this funny but heartfelt space opera about misfits who have to join together to save the galaxy – it has a 76 score on Metacritic (and an 8.6 user score) and is a whopping 91 percent fresh on Rotten Tomatoes (and deemed an even more whopping 95 percent fresh from audience there).