Hailey and Olivia Scheinman are seven-year-old twins with an unshakeable bond. Olivia was born with epilepsy and cerebral palsy, and Hailey spends much of her time raising money for her sister’s care, and awareness about families with children who have disabilities:

“It wouldn’t be hard to imagine a scenario in which the trajectory of the sisters’ lives simply continues to diverge. But something in Hailey has resisted that. She seems determined not to lose her grip on the being to whom she is closest in the world. Her mom thinks that because of Hailey’s efforts, the sisters are closer now than ever.

“What makes a good sister?

“Hailey Scheinman doesn’t have the answer. She’s 7.

“Hailey Scheinman is the answer.”