Apple knows that the bug randomly reboots iOS 7 devices, and has even promised that the problem will be fixed "in an upcoming software update.” Of course it has not said which update, or if your grandchild will ever get to see it, but a promise is a promise.
However, the bug is difficult to re-create. There does not seem to be any repeatable set of steps that consistently makes them crash. When they crash, the devices reboot and you are temporarily kicked to the same Apple logo splash screen you see when you power your phone or tablet. How will Apple actually isolate the bug enough to fix it?
One rumour is that the bug only happens when your sealed in battery is below 30 per cent. This suggests that it might be something to do with the power conservation features. After all what would save power more than just switching off your iPhone. The question is why did the problem not turned up in the beta tests, or, if it did why was it ignored? It is similar to Microsoft’s famous blue screen of death and just as annoying.
Based on various reports, the colour of the boot-up screen depends on the colour of your iPhone's face. A white iPhone face produces a white boot up screen with a black Apple logo, while a device with a black face produces a black screen with a white Apple logo. Apple fanboys insist that the OS is perfect and this is all a terrible plot by the liberal press to discredit Apple’s perfect designs.