Product review (3 stars): I breathed heavily on it and the face changed to happy. Still
Cute and functional. It isn't 100% accurate... My baby has a small room and we put on the humidifier overnight. humidifier was on one end of the room and this device was on the other. In the morning, the face was unhappy indicating there was not enough humidity in the room. I breathed heavily on it and the face changed to happy. Still, it does give some indication and that is helpful.
The happy face is a hit for my daughter, she will quickly tell me if the face is sad. It's good to kind of have that reminder in an easily digestible form.