Makemunich is a nice event for everyone who is into do-it-yourself. Especially if it has to do with electronics. There is usually a lot of things to do and see as lots of people present their projects. Also the many commercial exhibitors and of course the hebocon make it worth a visit.
This year, together with Alex, I talked about a project we did at University called Stratoflight. Its objective was to send a high altitude balloon equipped with sensors and a camera to a height of 30km above sea level.