TODAY

SCARY STUFF: There’s no better time than Halloween for “Crypt Crawls,” a rare peek into a cathedral’s underbelly. Guides will lead groups ages 12 and older through the church’s catacombs; no need for flashlights — you’ll see just fine. 10 and 11 a.m., 1, 2, 3 and 4 p.m., $12 for adults, $10 for students. St. John the Divine, 1047 Amsterdam Ave. at 112th Street; 212-932-7347.

PULLING STRINGS: While you wait for trick-or-treat time, hit Puppetry Arts’ Haunted Halloween Carnival in Brooklyn. Along with the puppets will be games and snacks for a buck apiece; a “Haunted Lab” ($2) and a Bouncy Castle ($3); the show itself is free. 11 a.m. to 4 p.m. First Street Recreation Center of PS 372, First Street between Third and Fourth avenues, Park Slope; 718-768-3703.

ALL ABOARD: Get a head start on the holiday season when “Disney’s A Christmas Carol” Train Tour stops at Grand Central, bringing carolers, faux snow and artifacts from the Charles Dickens Museum — plus a 3-D theater where you can see coming attractions and behind-the-scenes footage. Today, 9 a.m. to 6 p.m., tomorrow, 9 a.m. to 4 p.m., free. Vanderbilt Hall, 42nd Street and Park Avenue; 212-532-4900.

TOMORROW

MUSICAL MULTITASKING: It’s a real who’s who of kids’ entertainers at Symphony Space’s Super Duper Just Kidding Extravaganza. Cartoonist Sandra Boynton hosts a variety show featuring songs and dance from Father Goose, Dan Zanes, Sonia Manzano (“Maria” from Sesame Street) and Gustafer Yellowgold. 4 p.m., $35 for adults, $15 for kids. 2537 Broadway at 95th Street; 212-864-5400.

GO DUTCH: Experience life as a 17th-century Dutch merchant at the Navigate Early New York Community Festival. Kids can marvel at Flatbush shopkeeper Margrieta van Varick’s treasures, including a presqueeze bottle mustard pot, then watch a shadow-puppet performance, play old-fashioned games and more. Noon to 4:30 p.m., $5 for adults, kids free. 18 W. 86th St., between Fifth and Sixth avenues; 212-501-3000.