Some have been converted into living museums where actors in costumes meet the public and play the roles of characters from the past. In ar others history is made vivid and exciting through the use of realistic waxworks animatronic models, sounds and even smells to conjure up a sense of the past. Traditional festivals by definition do not change very much, but there has been a trend to increase the number of special events and festivals as cities realise that holding a music festival or an art event is a good way of attracting tourists