By Trisha Gedon STILLWATER, Okla. – When children dress up as their favorite superhero, princess or goblin, they likely have one thing on their mind: trick-or-treating and filling their candy container to the brim. But parents know there’s more to celebrating the holiday than choosing a costume and ringing neighborhood doorbells. Taking precautions ensures Halloween is both fun and safe, said Gina Peek, Oklahoma State University Extension housing and consumer specialist and interim associate dean. “The…