How can science centres compete in a world where information is so readily available from many different directions? Can we structure our exhibitions in a non-linear way and use mediation tools to successfully capture and captivate 21st century visitors? Mediation tools such as free visit scenarios, contents with strong highlights, specific museographic forms, among others, will be analyzed from both the designer’s and the visitor’s points of view. Do we risk losing visitors by giving them the freedom to wander? Do visitors actually want this freedom?