Around 39 percent of children aged between 2 and 5 watch TV daily and 12 percent use smartphones every day, according to Ajou University Hospital, which surveyed the parents of 350 young children.
Forty-eight percent of the children watch TV for an hour a day on average, and 66.5 percent had watched TV before they reached the age of 2. The survey also revealed that 36.5 percent use smartphones more than four days a week, and 12.2 percent had been exposed to mobile phones before they were 12 months old.