Windows Phone 8 introduces a new feature called Kid’s Corner where your kids can play games, apps and media that you explicitly select for them. They cannot access any other part of your phone. To set it up follow, these steps.
1. Tap on Start button, go to Settings and select “Kid’s Corner”. Tap Next.
2. Now, add content that you want accessible to your kids. Tap on the music, video, apps and games and then tap Done. Tap Next when you are finished adding stuff.
3. You will now be asked to set up a lock screen password. This is done to ensure that your kid cannot get to your Start screen. Set it up and tap Finish.
4. To exit Kid’s Corner, all you need to do is press the power button. After you do that, you will be back to the lock screen of your phone.