Now having guest user accounts is possible with Windows 8 phone with Kids corner. For those that are not parents, don’t let the name fool you this feature is great for both the kids and adults.  You can customize your Kid’s Corner, choose a name, wallpaper/background picture, background style and color. The kid corner allows you to choose which apps, games, music and videos show up when the device is in that  mode.  The new Windows 8 Phone feature helps those concerned with their kids or other friends using their phone.

Source: engadget