To setup a child profile on your Fire Tablet each adult profile needs to have a lock screen password or PIN setup for security. Tap the child profile to manage that child’s content. You can switch profiles from the lock screen. Lock your Fire Tablet by pressing the power button once, and then press power again. Your profile icon appears in the upper right hand corner of the screen. Tap your profile icon and then select the profile you want to use. If you’re switching from a child profile to an adult profile you will need to enter your lock screen password or PIN to switch profiles.