Thanks to Bill Alessi for sending in the details of the NeuroDreamer Sleep Mask that he and Mitch Altman are working on. It is an open hardware project that currently has almost $15K of the $66K of funding needed. The mask has RGB LEDs inside that are controlled by a microcontroller to give you a pleasant sleep experience. If you are wanting to make your own or a variation of this project have a look at the documentation that they have provided.