If you are looking for a game which can educate the kids and can give them the necessary information of the Earth, Little Alchemy 2 is the one that you are looking for. As the original version gained the love of so many players, the developers continue working on the second version.
This game from is the educational information. Not only will you enjoy mixing up the factors, but you will also learn about the name and the function of them. All of your results will be gathered and kept in your personal encyclopedia. Kids will be able to check the definition and the combination whenever they like.