The application developed must have an educational purpose but also be interesting for the child; to do that was necessary to turn it into a game.
For its implementation, we could choose between themes to be develop individually: math (and calculation) or languages. Choose it we had to develop it from the base (hence, features, setup, etc.) up to the prototype realization.
It was necessary studying many aspects: make it graphically, think a game interesting for children and develop a good prototype.