Impossible 13

5 months this time to get a new inspiration :). After being on vacation with many members of the family and having so many kids around. I could let my daughter stick to me all the time. That included putting her to sleeep in a diff floor in the house or a totally different house. So i was wondering if there is a way i could know if she woke up or is crying or anything happeneing out of the ordinary to her while iwas away. Then i thought what if there was a device that would send me a message telling me her status. Ie crying.. talking... anything. I know there is a baby monitor but how far could u get. Anyone knows of this invention already existing??