In embodiments of mobile device child share, a mobile device can display a default device lock screen on an integrated display device, and receive an input effective to transition from the default device lock screen to display a child lock screen without receiving a PIN code entered on the default device lock screen. The mobile device can receive a second input effective to transition from the child lock screen to display a child space. The mobile device implements a device share service that activates a child share mode of the mobile device, and restricts functionality of device applications and access to device content based on designated restriction limits.