They decided to read as long as they possibly could.
"When Alice Ozma was nine years old, her father made a promise: to read to her every night, without missing a night, for one-hundred nights. But once the pair met their goal, they couldn't stop. 100 became 1,000, and eventually, they decided to read as long as they possibly could. The Reading Streak, as they called it, ultimately lasted 3,218, finally ending on Alice's first day of college."
Watch this short video describing her journey.