Just like how you set boundaries for your kids out in the real world you want to do the same thing in the internet connected world. One way you can do that on the Microsoft Windows Phone 8 is with Kid’s Corner. I won’t go into the details of how enable it. You find out how to enable Kid’s Corner anywhere on the web.
But once you enable Kid’s Corner, it is real easy to access. Swipe left from the Lock Screen then swipe up. All you have to do enable the feature, add the apps you want your kids to access, set up a lock screen password and you’re done. You can customize the lock screen with a picture and screen title for some customization. The kids can resize and reposition their tiles in Kid's Corner as well as choose a theme color. They won’t be able to get onto the web, your email, settings, etc - basically any area or app you don't want kids to access.
So whenever your kids want to play with your Windows Phone, swipe left then up and put them in the Kid’s corner. I can’t tell you how much this has made my life easier when the kids ask me for my phone to play games. I have two, the Nokia 925 and the HTC 8x, and both have the Kid’s corner enabled. My wife has the Nokia 1020 with Kid’s Corner enabled.
You can't set up multiple profiles like you can on the Kindle Fire's Kindle Freetime which I blogged about earlier, but for me that's ok. At least my kids can still use the Windows Phone's in our house without my wife and eye having concern about them getting into or changing things in our corners.