For my son (4th class) is its NDS indispensable, my wife and I try not to let him play through, because we are still of the opinion that the children should have at that age there are other things on his mind. However, we have made a long time ago already his preference for the benefit. We want that it brings good school performance and he wants his daddeln on NDS 'because I came across the Lernerfolg_Reihe of Tivola and was immediately enthusiastic. Recently we have also bought the English title of the series and our youngest is learning now with the complete educational game series and is enthusiastic. We also, for his school grades have improved since. He does not realize that he is learning while he plays. That's how it should be. Therefore, I can only empüfehlen the games!