There are various reasons why Ray Bradbury may have chosen to call his story "The Veldt." It is an arresting title, since the veldt is an unfamiliar environment for most readers: dangerous, exciting, and populated by exotic animals. At the same time, the title gives the reader very little idea of what to expect, maintaining the element of surprise. "The Nursery" is an altogether tamer title, more closely linked to the literal subject of the story.
Bradbury's use of "The Veldt" as a title also maintains a fine balance of irony. In one sense, the veldt is everything that the children's environment is not. It is artificial and is not even outdoors. Far from being out on the plains of Africa, Peter and Wendy enjoy an unhealthy cloistered existence in a fantasy created by a machine. However, in another way, the wildness and danger of the veldt is reflected in the personalities of the children, who behave with the arbitrariness and calculating violence of wild animals. George and Lydia believe that they are in control of both house and children. In fact they are prey and have failed to realize the danger of their position, like herbivores on the veldt, blithely unconscious of the threat posed by the lions in the distance.