My 3 year old always left the room too early.

I created a traffic light which will indicate her when it is time to a) leave the bed (Orange) and play in the room, b) leave the room (Green), or c) stay in bed (red).

The name can be removed or changed, just PM me.

The webinterface running on NodeMCU V3 ESP8266 by wifi. It´s in use now for 6 months and working flawlessly.

Quick and dirty, I just connected the LEDs to the NodeMCU. Although using resistors might be better idea.

Brightness of LEDs can be changed on the webinterface.

So far it´s 80/20 in favour of the traffic light agreement ;-)

PS: I added an Olaf from Frozen on top, but didn´t put it in the files due to Copyright issues. You can just add anything you like by addin gin Bambustudio