For those who like to enjoy a wonderful atmosphere on the one hand, on the other hand are afraid of candles / open fire, these LED lights a great alternative. And against most candles have this LED lights even a color change for free. In addition, LED lights hold longer than a candle.
For kids, I think they are less suited to fall asleep. Apart from the fact that it for the brain to switch from light to dark is important for recreation, is the Color change fortiori even less likely to give the brain to calm down.