Musical.ly just may've replaced Instagram as kids' starter app. This is an educated guess. I remember a few years ago my friend Trudy Ludwig, the award-winning children's author, observing that, based on all the elementary schools she visits throughout the U.S., Instagram was huge with 4th and 5th graders. Don't get us wrong, we know the official minimum age of these apps is 13. The reality, … [Read more...] about Musical.ly inclined: App huge with younger users