Bill Gates said his three children understand why he has pledged to leave his £70 billion (NZ$120b) fortune to charity when he dies.
In a revealing insight into his private life, the Microsoft founder, 60, said his children are "proud" of his decision to dedicate his money to helping the world's poorest.
Gates said that instead of billion-dollar trust funds, his two daughters and son will be given a "great education" to help kick-start their own careers.
But the business mogul did say there would still be a financial safety net in place, adding: "They are never going to be poorly off".