On the mathematics meets industry day (MiMM) we gather mathematics enthusiasts from a wide range of competencies. Senior researchers, doctoral students, people from industry, university students as well as high school students attend the day, all with a huge interest of mathematics. Industries, both from Sweden and other countries, are invited to pose a real problem. To create a creative atmosphere the participants are given full freedom in their approach on the problems. We have organized this day yearly since 2017 and the evaluations gives proof that gifted people flourish when engaged in such open-ended opportunities. In addition, the one-day work of the participants give industry important input on the posed problems, and sometimes the problem is given a solution. An important result of the day is the perceived joy the participants express for coming together with like-minded individuals and opportunity for challenging thinking. In our presentation we will present guidelines on how to set up a day like this. We will also present a summary of the event’s evaluation based on the seven years the MiMM day has been running.