I remember the day I was way late from school and met up with my frantic mother as I walked home. She was walking quickly and carrying a metal comb with a pointy handle. This was for stabbing my attackers, or at least the ones that entered her mind as she fretted.
Of course, technology these days brings us a saner way of tracking down a late kid. One is KIdGPS, by mobile accessories maker X-Doria. It’s a palm-sized tracking device the kids carry so that nervous parents can check on their whereabouts via a companion app on their iPhone or Android device.