If it seems like all your friends have smartphones, you may be onto something. A new report by Common Sense Media, a nonprofit that reports on technology and media for children, found that by the age of 11, more than half of kids in the U.S. have their own smartphone. By age 12, more than two-thirds do, and by 14, teens are just as likely as adults to own a smartphone. Some kids start much younger. Nearly 20% of 8-year-olds have their own smartphone.