This is a really great idea and I’m sure that the technology to make it is not far off, if not already possible. When the “Problem” heading was up in your venture pitch the information was going by too quickly for me to catch, so I might slow that down or take some information out if pitching to real investors. You also might want to stress the preventative properties of the product. If it alerts the child after they’ve already lost it, it might result in a lot of smashed iWatches, so it would need to warn the child before they get in too deep. There are also some of us who associate “Emo” with a type of music and a subculture, but probably not enough to really matter.