An interactive electronic device shell and light source may enable personalization and increased functionality of an electronic device. The shell may at least partially cover a light source and attach to an electronic device. The shell includes at least some transparent or translucent portions (e.g., light stencils) that enable light from a matrix of the light source to emit through the shell, thus causing a display of light from the shell. In some aspects, the electronic device may be linked with the shell and/or the light source to control light emission through the shell. In various aspects, an illumined portion of the shell may have significance, such as revealing an artistic design or indicating a message based on activity of the electronic device.