In St. Louis this March, two competing conventions brought together professionals from the haunted house and Christmas display industries, offering a unique glimpse into the business behind two major seasonal celebrations—Halloween and Christmas. Hosted by trade show producer TransWorld, the events provided a marketplace for vendors and buyers to source decorations, props, and special effects months ahead of the holidays.
The sprawling convention center was strikingly divided between contrasting atmospheres. One half featured festive scents of sugar cookies alongside traditional Christmas music, complemented by intricate light displays synchronized to sound, foam machines producing artificial snow, and animatronic polar bears. Meanwhile, the opposite side presented a macabre scene with odors described as “charred corpse” or “rotting decay,” enhanced by soundscapes of eerie screams and monster growls, punctuated occasionally by loud air horn blasts. Here, attendees could find highly realistic horror effects, from lifelike entrails and mutilated limbs to animatronic creatures designed to frighten and entertain.
Among the attendees was Scott Swenson, a consultant who assists theme parks and attractions in planning their Halloween and Christmas events. Swenson, who is bound by nondisclosure agreements and thus unable to identify his clients, described the event as a hub for professionals seeking highly specialized materials. “I actually have a tendency to like a darker blood, because it’s more realistic,” he explained, referring to the range of artificial blood options available from vendors.
The conventions attracted a diverse group of participants, including professional haunters, neighborhood attraction operators, animatronic engineers trained for Hollywood, drone show choreographers, and longtime family-run prop shops. Many vendors have honed their craft over decades, refining products such as monster teeth, clown masks, and other specialty items. This gathering underscores the growing financial impact of the Halloween industry, which is estimated to generate approximately $13 billion annually.
For many in attendance, the conventions serve not only as commercial venues but also as communities where enthusiasts and professionals alike can express their creativity openly. Swenson noted that the events provide a rare environment in which those passionate about creating spooky or festive experiences can freely share their interests without judgment.
As buyers and sellers gathered months before the holiday seasons, the St. Louis conventions highlighted the intricate planning and extensive supply chains that support two of America’s most popular celebrations, blending the joyful and the terrifying in one expansive marketplace.