Nowadays, it is very common to use digital tools in daily activities especially young people benefit from it so much. This issue has two aspects for the designers of museum facilities. Digital  tools are very attractive because of their fascinating motion pictures and especially visual effects. The digital tools make unlimited opportunities for us as designers of science centers/museums to show the audiences the invisible aspects of the nature or an industry (for example inside an atom or an atomic reactor and so on).
But this is the good side of digital tools, on the other side frequent use of these facilities at homes can lead to lack of interest in audiences to visit these science centers and hence decreases the function of science centers/museums. In this paper, some basic rules for designing a digital tool for science centers/museums have been investigated and then as a case study a mechatronic tool is designed for a science center.