Accompanied by Viking Bob Glass blowing bubbles, Nicholas Neil performed on a theremin (an electronic musical instrument controlled without physical contact by the thereminist) for trick or treaters in front of the Siren Song Tavern.

A sugary treat or a polished rock? "We've given out bags and bags of the rocks," said Treia Walker at the Here & There & Vintage store.

NBA fans Alicia Weems, of Bayside, and Juliet Ferri, of McKinleyville dressed up as Steph Curry and Earvin "Magic" Johnson Jr.

Ruby McKay (left) and Nayenna Murray found it much warmer inside Homie Designs for their trick or treat location.

"Alice in Wonderland" (Olive Batterworth) and her mother (Nina Chadwick) helped greet trick or treaters at the new Otto and Olive boutique store.

The Newman family of McKinleyville stopped for a photo in Old Town.

Lauren Shafaer at the Irish Shop needed a treat bucket in each hand to meet the demand.

The tin man and scarecrow (parents Dave and Jessica McBroome, of Eureka) guided their children Auburn and Henry through the crowds of trick or treaters on Second Street.

Ladybug Erika Diaz and her spider-webbed sister Marissa Robinson. of Eureka, showed off their costumes in Old Town.

Participating stores in Old Town exhausted their supplies of treats quickly with the large crowds attending the event.

Michelle Lundquist of the Siren Song Tavern played catch with bubbles created by Viking Bob Glass.

Sister D, with a baby bump, played with a basketball.

Wonder Woman (Leah Blakely) and the crazy cat woman (Breannah Stevens) took a break from trick or treating to play at the Gazebo.

A very cute skunk costume kept Jin Saechao comfortably warm on a cool fall day of trick or treating in Old Town.