If one wants to acquire a sense of how to exhibit science, the natural place to go is the technology museum. Through its technical applications, the tremendous progress of twentieth-century science can be grasped, even literally touched. In most cases, the theoretical sciences also have made their way into the museum — sometimes in a very ambitious manner, sometimes in a way that is embarrassing at best. Thus, the task of a 'scientific coordinator" in an arts and science exhibition seems to be no more than to devise a suitable combination of didactics of both science and museum pedagogy. To this end, she or he will build heavily upon models. For example: "The electron in a quantum-mechanical double-slit experiment feels whether one or two slits are open;" "Quantum mechanical observables are a sort of infinite-dimensional matrices;" "A non-pathological curve is defined by the continuous motion of a point."