What are examples of irony in the story the veldt?

"The Veldt" hinges on the presentation of situational irony, specifically taking the form of unintended consequences, as does much of Bradbury's work. A nursery is very much intended to foster children to happy, healthy adulthood--and the outcome is quite the opposite.

Further, the majority of the technology present in the house is intended to make the lives of the homeowners easier and decrease their stress level. Instead, before their unfortunate deaths, they stress ceaselessly about their children, and Lydia feels as if she is losing her humanity to the house.