"This is the only time that you see the real Reeva," executive producer and director of "Tropka Island of Treasure" Samantha Moon told "Good Morning America." "She was kind and sweet and ... so hard working. They will see the girl that we loved."
On "Tropka Island of Treasure," Steenkamp is shown laughing and smiling. The show aired some of Steenkamp's last words:
"The way that you go out, not just your journey in life, but the way that you make your exit is so important if you even made an impact in a positive way or a negative way, but just maintain integrity and maintain class and just always be true to yourself," she said.
Steenkamp's father, Barry Steenkamp, told the Sunday Mail that they "just need to find some answers."
"We ask the lord every day to help us find a reason why this should happen to Reeva," he told the Mail.
Oscar Pistorius will remain in jail until at least his bond hearing next Tuesday.
ABC News' Colleen Curry and The Associated Press contributed to this report.