Edit: If you want a version of this that works, check out the remix by Derare!

Work in progress remix of a "Hey That's my Fish" hex grid for use with my D&D style world map tile system, available here: https://www.thingiverse.com/thing:3728353

Scaled it down, added a rim/seat/gallery to the interior and exterior of the tiles and made the walls a little taller. Snaps together fine, not entirely happy with some of the slop in the hexes formed by the grids coming together, but will refine in the future.

Feel free to improve this grid, or make other means of holding/wrangling these tiles as you desire; I'm not very skilled with precision modeling (I'm classically trained in ceramics!).

One great idea is to glue sheet magnet pieces to the back of the tiles and use them with a whiteboard or other magnetic surface! Map your world on a fridge :D