I’m looking for a device that would provide a gentle alert at night. A soft sound plus a dim light. Before I start hacking I thought I ask here if anyone is aware of such a device? Basically, I want to be alerted about my 2-year-old leaving his room in the middle of the night, but without waking up my wife and a two-month-old daughter. I do not usually have my phone near me (long story), so it has to be a separate physical device (or two).
Any ideas for hacking something like this together would be appreciated as well.