Zach Richter and Chrissy Szchupak tell ABC how they re-created 'Hallelujah.'

Dr. Timothy Cripe and his son are raising money to develop a free video game that lets kids fight cancer, in memory of one of his patients, Kate Amato.

A doctor urges parents to closely monitor their kids' use of the headsets.

Because the technology is so new, some doctors are unsure of the long-term effects for children using the headsets.

Small study finds paraplegics helped by VR technology.