Free workshop Essentials of College Planning, 9 a.m. and 1 p.m. at Houlton Higher Education Center. To register or FMI, call 1 (800) 281-3703 or visit meoc.maine.edu.

Harry Potter House on Halloween, 5-7:30 p.m., at the Walter T.A. Hansen Library. Kids can collect characters' signatures and even catch a chocolate frog.

Community Coffeehouse and Open Mic Night, 6:30-8:30 p.m. in the Owls Nest. Every Thursday; musicians, poets, etc., from campus and community welcome.

Betty's Book Club, 3-4 p.m. at Caribou Public Library. Meets once a month, second Wednesday; new members welcome. April book: "The Number One Chinese Restaurant" by Lilian Li. Pick up […]

Dungeons and Dragons at Caribou Public Library, 3:30-7 p.m. every other Thursday. Ages 13 and over. Materials provided.

Discover Girl Scouts, for girls in grades K-3 and parents/caregivers, 6 p.m. at Van Buren Community Center.

Red Cross blood drive . Download Red Cross Blood Donor app, visit redcrossblood.org or call 1 (800) RED CROSS for an appointment or more information.