Teen Halloween Costume Party (Ages 13–15)

Sat · Oct 31·10 AM – 11 AM·Boston Public Market

Drop-In Craft at Boston Public Market — craft activities for ages 3–13.

Sat · Oct 31·10 AM – 10:30 AM·Central Library in Copley Square, Children's Library's Rey Room, Boston

Story time with books and songs in the Rey Room at the Central Library, for ages 0–7.

Sat · Oct 31·10 AM – 11 AM·Boston Nature Center and Wildlife Sanctuary , Mattapan

Boston Birding with Family at Boston Nature Center and Wildlife Sanctuary in Mattapan, open to all ages.

Sat · Oct 31·10:30 AM – 11 AM·Roslindale, Roslindale · Boston

Miss Celeste reads Halloween stories at Roslindale, Roslindale, for ages 5 and under.

Sat · Oct 31·11 AM – 3 PM·Institute of Contemporary Art Boston

Halloween Art-Making: Spooky Story Spinners at the Institute of Contemporary Art Boston.

Sat · Oct 31·11:30 AM – 1 PM·Lower Mills, This event will be held inside the library's community room., Dorchester · Boston

Girls' Chess Club (Lower Mills community room, Dorchester) — Extra chess session for girls, called Lower Mills Rookies, open to all ages, no registration, also on Zoom.

Sat · Oct 31·12 PM – 3 PM·Hunnewell Lawn, 125 Arborway, Boston, MA

Sinister plants demonstrate spiky thorns, sticky latex, chemical defenses, explosive seed bursts, and black‑light glow on Hunnewell Lawn, with a storytime at 1 pm, all ages.

Fri · Oct 30·7 PM – 11 PM·1524 Dorchester Ave, Boston, MA

TGIF Paint Night — Specialty Edition takes place at 1524 Dorchester Ave, Boston.

Mon · Nov 2·5:30 PM – 9:30 PM·1524 Dorchester Ave, Boston, MA

Public paint party with hands‑on art activities at 1524 Dorchester Ave, Boston.

Tue · Nov 3·10 AM – 2 PM·1524 Dorchester Ave, Boston, MA

Toddler Create & Play at 1524 Dorchester Ave, Boston — creative play session for ages 1–4.