Little Alchemy is Geology and Earth Science game, where you try to create new elements by combining existing elements together.
Four starting elements: Air, Earth, Fire, and Water. There are total of 550 elements. It is pretty realistic, for example water + fire = steam.
Every combination is a little puzzle to solve. Will you be able to discover all the elements?
There are fiction elements just to be make more interesting like unicorns and dinosaurs.