Close to 97% of parents said their children use mobile devices, most of whom started before their first birthday, according to a study published in Pediatrics. The findings, based on a survey of 289 parents of 350 children who lived in "an urban, low-income, minority community," reveal that three-fourths of the children owned their own mobile device at age 4, 20% had their own tablet computer at age 1, 28% could navigate a mobile device on their own at age 2 and 21% owned a gaming console at age 4.