I received this from Lukas at FWSim:


I'm Lukas, creator of FWsim Fireworks Simulator. It's a simulation software used both by professionals and fireworks enthusiasts.

Since New Years celebrations will be very restricted this year, I have decided to make FWsim available free for everyone from December 25 - January 1:
https://www.fwsim.com/digital-fireworks-celebration.html

In addition, I'd be very happy to provide your group members with some copies of FWsim Creative Edition. These could be given away in a draw, or in any other manner you want. Let me know if you're interested!

Paul.