For my Plush Night Light I am making one of the four elements.
I have bought eight ambient LED that change brightness constantly. You know, the kind of LEDs in fake candles.
I will incorporate these into my Plush element and I am not planning on using Arduino.
I have sketched three:
Fire Plush
In this one the Fire Plush should light up like the fire in a Candle.
Water Plush
This should have the effect of glimting water in the sun.
Moss Plush
The Moss Plush represents Earth and should have the effect glimting moist moss in the sun.