This is a really unique faction! I can imagine so many factions trying to take advantage of the free movement of the Tortoise. I don't think I've ever seen a faction use materials that weren't cardboard or wood, but I can totally see the blue ribbon representing newly dug canals. The options this opens seem endless!
I was a little confused about the structure of the Canals, though I think it's something that would make a lot more sense with an in-person demonstration. The berry ability says that you place a blue ribbon and a "wood", but I'm not sure what that is?