Costumed kids can explore the Arroyo Adventure after hours, meeting fun and frightful characters while searching for candy and other treats.

Guests should bring their own treat bag to store the goodies.

Other frightfully fun activities around the museum include a costume parade with dancing, making “ectoplasm” at the slime station, and becoming a mad scientist with a “franken-art” project.

Note:  tickets are timed.  Registration opens to Kidspace Members on September 7, and to the public on September 16. A timed-ticket to the Monster Mash includes museum admission for the night.