Last year, the 3 Kings Church had a fabulous, 30 min. light show with music, called Genesis. This year, it is called Enlightenment with music by Vivaldi.
If you are museumed out and looking for something cool to do, this might be perfect for you.
I went to the one last year, 3 times and already have 2 nights booked for this one. Starts tonight and goes til 26 Nov.
https://eonariumexperiences.com/frankfurt/enlightenment/en/
The church is easy to get to, right on the Sachsenhausen side of the river, almost directly across from Kaiserdom.