The Pride Parade in St. Petersburg is billed as Florida's largest, often drawing a crowd of 90,000. The parade begins at dusk, turning the streets of St. Pete into a massive, moving, nighttime celebration. The following day there is a large, family-friendly Pride festival. For several years, the organizers of the St. Pete Science Festival brought a table to the day-time festival, to hand out promotional materials and share some hands-on activities. In 2019 they joined the parade with their own colorful parade float. The float had a science of rainbows theme, was packed with dozens of volunteers dancing to a DJ's "science-themed club music," and was surrounded by a team on foot handing out thousands of diffraction glasses to the cheering crowd (these glasses make every light source look like a rainbow).