Teenagers were engaged in a wide variety of digital activities, although the most popular were related to various types of communications. Fully 87% of respondents said they had sent or received a text message. Next was mobile/online game playing (82%), followed by email (81%), social networking (81%), online instant messaging (71%) and using Instagram (42%). Interestingly, several activities saw significant drops between 2012 and 2013, including email use, instant messaging and Twitter use. Instagram use, meanwhile, climbed 12 percentage points between 2012 and 2013. Read the rest at eMarketer.