From September 16 to 21, 2019, the highlights of physics in Bonn focused on how current physics research succeeds in making the invisible visible. The heart of the science festival under the motto „Show yourself“ was an interactive exhibition on Münsterplatz. At each of the approximately 40 exhibits, scientists from Bonn and all over Germany were available for questions, explanations and discussions. With our contribution „Rechenkunst mit Quantentricks“ we were able to show the basics of a quantum computer based on stored ions in a generally understandable way. The live demonstration of a functioning Paul trap, named after the former Bonn Professor Wolfgang Paul, invited to lively discussions on the topic of quantum computing. There were also science shows, live experiments, the Einstein Slam, a junior lab, workshops, a competition for schoolchildren, numerous lectures and lots of science to touch and try out.