We gave our DD a flashlight, and negotiated a firm "lights out" time with her. We reminded her (if she was still awake at that point).

But this has been an ongoing thing at our house, too. I would probably NOT use an e-reader for a child this age, unless it is lacking gaming/internet functions entirely, and has a brightness setting that you can tamp WAY down-- screen lights can interfere with sleep regulation.


Schrödinger's cat walks into a bar. And doesn't.