The “Polar Express” 4-D Experience running from 9:40 a.m. to 4:35 p.m. Saturday and Sunday at  the Museum of Science, 1 Science Park, East Cambridge. Tickets are $5 to $6, or less for members.

This is the final weekend to see this Caldecott Medal children’s book by Chris Van Allsburg brought to life as a digital 3-D film with “4-D multisensory effects.” (It’s replaced Monday with the “Happy Feet” 4-D experience, but the museum also has “Dora & Diego” and “Planet Earth: Shallow Seas” experiences running.) The movie is about a doubting young boy who takes a supernatural train ride to the North Pole and experiences the wonder of life, yada yada yada. It’s also the film that encapsulates the creepy “uncanny valley” phenomenon of animation that is a little too human without being human enough – but that can be forgiven in this case; the point of this is to get an immersive experience available only at the Museum of Science, then to check out what else the museum has to offer … which is always great. Information is here.

Jamie Mclaughlin’s “Sordid Tales” official EP release at 2 p.m. Saturday at Outpost 186, 186.5 Hampshire St., Inman Square. Free.

How trippy can you take your music? Do you have the patience to confirm you’re listening to music at all? Jamie Mclaughlin, a model and political activist as well as experimental and noise musician, celebrates the release of her seventh album, “Sordid Tales” with this show – likely performing some but not all of an album that at last report still had 101 tracks. She might record a song at a slot machine in a Nevada casino or on the red line in Cambridge and will take on any topic, and there’s no doubt a live show will be a riveting and revealing bit of weirdness.

“Fool Descending a Staircase” at 7 p.m. Saturday at ImprovBoston, 40 Prospect St., Central Square. Tickets are $12.

This new comedy from local playwright Scott Kremer imagines what would happen “if a surrealist painter wanted to host a television variety show, fell in love with a waitress and discovered the magical powers of cake.” Kremer presents a fading talent agent, Abe, who owes money all over town, trying to convince equally fading television executive Marty, who is about to be squeezed out, to buy a television variety show hosted by surrealist painter Paul Klee. “Why does Klee want to host a television show anyway?” the theater’s pitch asks. “Can Klee concentrate on the show without being distracted by the beauty of waitress Wendy, who’s determined to be a star? What about the nephew? And what about the cake? Is it moist?” The play continues for the next two Saturdays, Jan. 10 and 17. Information is here.

Humor for Humanity: An Evening of Comedy, Commentary and Conversation with comedian Jimmy Tingle at 8 p.m. Saturday at Sanders Theatre, 45 Quincy St., near Harvard Square. Tickets are from $30, or $45 for an additional “Mingle with Tingle.”

Political humorist Jimmy Tingle has done post-holiday shows before, but this year Tingle is vowing to do more than just take on such current events as a new pope and legal pot, missing planes and midterm elections. He says he’s started Humor for Humanity and booked this Sanders show to serve as the rollout for a social enterprise, business idea and service: “Our mission is to use comedy, commentary and conversation through social media, radio, television and live events to raise spirits, funds and awareness for nonprofits, charities and social causes,” said Tingle, a 2010 Harvard Kennedy School grad. “We aspire to be of service to many worthy causes and organizations that need support … we want to show that humor can help, humor can heal and above all, humor offers hope and can help make meaningful change in the world.” Information, including a guide to charities for the show (including the Weekend Backpack Program and Spare Change News) and how to help, is here.

Scrabble Enthusiasts of Boston Meet-up from noon to 3 p.m. Sunday at Au Bon Pain, 18 Holland St., Davis Square, Somerville. A $1 contribution is requested.

This informal meet-up meets every first and third Sunday of a month, with people often bringing their own boards and staying typically for one to three games to try their skill against players described as “a little below most tournament players but mostly above the average living-room-only player.” New players of Scrabble and “Words With Friends” are welcomed, and RSVPs are requested here.