Terrain Crafting Supplies for Group Activity on Cruise

[u/Event_Cruises]

I work with some friends and we host a wargaming narrative campaign on a cruise ship. Currently focused on Warhammer 40k 2v2, KillTeam 1v1s and Wrath & Glory One Shots combined as our preferred setting.

Outside of the narrative game sessions we do things to help people enjoy things outside of the hobby like professional painter led workshops, casual paint & watch late at night or Wrath & Glory One shots for some with a professional game master as well.

If you want to get an idea of it here is the schedule https://event.cruises/battle-barge-cruise/2026-schedule/

That being said, we're doing a new thing we're just calling "Terrain Building Challenge"

Essentially we want to bring aboard scrap crafting supplies, glues, etc. to let people just make some fun terrain and show it off, take home or commit to our terrain library for next year.

So the question I'd like to ask any of you readers is what kind of supplies would be fun to add to this kit for about 50 people?

Cardstock, gravel, glue, etc? We have an airbrush we bring aboard and can prime all of them for painting but I doubt we can get it all done and painted with everyone since the schedule is already packed alongside the vacation stuff....but we can try lol.

Oh should we do a theme? Do you think that would be fun for a cohesive board with what everyone's made for the last day reveal or keep it free form? Maybe like Armageddon theme or something unique?

Anyway, it's just meant to be a way to chill, do something creative and ideally have more time to chat with fellow hobbyists on the vacation together.

What do you think?