A giant bug stomped through a field of toddlers. Kangaroos and kookaburras threatened to leap out of computer screens. Bassoons and oboes shrieked like wild animals. It sounds like a chaotic scene from a movie. But the cacophony of children’s voices on the University of Virginia’s Arts Grounds on Saturday morning was anything but scripted. It was the sound of learning, discovery and creativity -- the sound of Family Day at the 26th annual Virginia Film Festival.