Disney begins testing ‘Harmonious’ water effects at EPCOT New show in early development Tags: Disney Imagineers testing Harmonious Barges at World Showcase Lagoon March 11 (Cindi Gilland) ORLANDO, Fla. – Walt Disney World Imagineers began testing some of the water effects Thursday for the new upcoming show “Harmonious.” The show will be one of the largest nighttime spectaculars ever produced at a Disney park when it’s complete. [TRENDING: ] Guests visiting Thursday watched as one of the barges in World Showcase Lagoon began streaming water out of the barge and its large rotating arm. Ad Disney Imagineers said each barge will house a number of show elements including custom-built LED panels, choreographed moving fountains, colorful lights, lasers, pyrotechnics and more.