In 1965, the War Lord Tower opened as one of the first attractions in the theme park. One of the early struggles for Universal was coming up with things for young children to do. The existing small Ma & Pa Kettle Petting Zoo was expanded into the Ark Park. This area encompassed the Mt. Ararat petting zoo with over 200 animals and birds representing 30 species and a Noah's Nursery and a Noah's Love Inn playhouse for children and animals. This was followed by the opening of the Animal Actors' School Stage in 1970. In 1968, the Screen Actors Guild enacted a rule prohibiting visitors from most soundstages. This new rule, coupled with more productions being shot on location, meant the backlot tram tour could not show visitors much in the way of real movie and television production. Jay Stein, President of the Recreation Division, championed the idea of creating exciting experiences for visitors in place of viewing actual production. Later that same year, the Flash Flood set was opened and this first special-effects attraction proved to be a hit. 20,000 gallons of water rushed 200 feet down a narrow Mexican village street, uprooting an old tree and threatening to engulf the tram. The Parting of the Red Sea attraction opened in 1973. In 1974, the Rockslide staged event was added to the Studio Tour. The following year, The Land of a Thousand Faces opened on the Upper Lot. In 1979, the Battle of Galactica replaced Rockslide as a staged event on the Studio Tour. In 1989's "The Wizard", it was the site of the fictional Video Armageddon competition which gave way to the Nintendo World Championships held in 1990.