I wanted to give some extra info about this since it sounded really interesting.
In mid-May, the location to do the projects was in a kiosk by the water and not inside Germany.
The kiosk is pretty tight and you need to stand to do the project - it seems like more than one group doing the project at a time would be unpleasant. I was trying to look and understand the options while someone was doing one, and it felt there wasn’t a whole lot of room. It also was outdoors, so not air conditioned.
I thought it might be a nice break and way to get out of the crowds and heat, but the location made it impossible.
I just wanted to share in case this helps anyone considering it. The idea is awesome and the finished products look nice, but it’s not a seated or air conditioned activity.