It's not just kids. I used to work on mobile software for guys doing various kinds of outdoor field work. I told clients to figure on replacing their PDAs at least every two years. I'd reckon about 20% broke outright each year, and at the end of two years even the ones that weren't actually broken were falling apart from heavy use. These were well-made PDAs in rugged cases that guys could carry in their pockets. I shudder to think what they're doing these days with iPads.
When you're thinking about adopting any kind of gizmo that's supposed to be used all day long, you have to look at that gizmo as disposable. Stuff happens to things you carry around all the time. I have a light touch with equipment, so my stuff tends to last longer than most people's; but even I once broke a Newton screen, back in the early days. There was a guy in my office who destroyed one laptop per year, like clockwork.
I used to tell my clients that equipment was made to be used and thrown away. The important thing is preserving data. If a device is so expensive you've got to count on people mollycoddling it, it's not ready for field use.