An art museum in Minneapolis offered an otherworldly weekend activity for families earlier this month. The Walker Art Center invited parents and children to participate in what the museum described as a totally free “collective and playful demon summoning session,” on August 5.

“Demons have a bad reputation, but maybe we’re just not very good at getting to know them,” an advertisement on the museum’s website read.

According to The Messenger, The event, which was hosted by artist Tamar Ettun, was broken into two parts. First, visitors worked with Ettun to design a vessel for “the demon that knows them best,” with some examples including the “demon of overthinking” or “the demon of not trusting your gut,” the museum website explained.

After constructing their vessels, guests were invited to watch Ettun perform a summoning ritual for a spirit named Lilit the Empathic Demon.

“[Lilit] will come from the dark side of the moon to lead you in locating your feelings using ancient Babylonian techniques,” the website said.