The universe of possible actions is constrained , which simplifies the choices to be made and gives the student tools with which to make decisions. Basic concepts are related in some way to concrete realizations . For example, in Papert's LOGO language, the movements of a turtle are used to introduce students to problem-solving and programming. Thus new knowledge builds on existing personal knowledge of things in the real world. The environment is easy to use and allows the student to operate with a variety of skill levels.
Experiences build on experiences to draw the student in to more complicated questions.
The environment engages the student in an exciting process of learning because the environment is rich in a variety of questions that can be posed and hypotheses that can be tested. The environment is open- ended and thus allows students to learn by designing, thus actively involving their curiosity and engaging their habits of exploration in scientific theory construction.