Computer based learning permits children to spend the time at the computer in a particularly valuable manner. By handling e-learning software, the children first of all get used to using computer programmes, which becomes a more and more important skill in our computerized world. A second advantage is that complex issues can be represented in the form of text, pictures, tones, video and animation. Complex and large programs can be used, since one also can do without a direct stream. This helps particularly to promote the fun at learning already in the early childhood. Studies show that children, which learned to learn with joy are often more successful in later life than children, which did not learn to enjoy learning. One distinguishes pieces of learning software according to degrees of interactivity. In simulation systems, issues are solved playfully. This kind of games often help to mediate very complex issues. An example of such a simulation is the famous game Sim City, in which the player must develop his own small city. Often somewhat simpler are the so-called tutorial systems, which react to inputs of the child, and support the learning progress by intervening if needed. One can see the third kind of systems, the so-called presentation systems, as alternative to the good old book. These mostly transmit a teaching program in the form of multimedia, most notably in movie clips. Novadays, the interaction with other children does not suffer anymore, because ever more e-learning programs offer interaction modules that enable communication over the Internet. As these interactions are constantly supervised, one does not have to fear that the child does get in contact with things that are not intended for its eyes. Thus, the child can interact with other children, while at the same time improving its computer skills.