Last Saturday, there was an open house at the university of Twente. About 2500 interested people came to the university to find out more about what is happening at the university and what kind of work we do here. We also showed our work on the bubble-gun to a wide audience, from small children to elderly and from colleagues and families to interested neighbors. The visitors could find out more about our needle-free injections, and children could create their jets from an enlarged version of our needle-free injector. It was a big success!