All sorts of weird things have been found in sea chests. But...an actual sea?!
This one's a combo of having a long-simmering idea and wanting to see just how cheaply I can build something. The whole thing is made of balsa wood scrap, clay, toothpicks, Kleenex and plastic plant parts - the only thing bought specifically for the project was a dollar store chest. Just picked at it over the weekend, maybe five or six hours of work. I'm considering this a prototype for a larger, more ambitious project down the road, now that I know what kind of work goes into it.
Edit: added another photo for scale: