Books
Instead of discovering things in the wild, or letting friends explain them to you, maybe we could add books that could explain that specific thing.
EDIT: book idea is kinda halved down, parchment already fills half the role
ydex wrote:parchment already can be made to do exactly what you proposed with book. make a new parchment right click item to it and write it. then read it n get discovery.

So you clicked your item, and clicked on a book, like you click on a player, and then you would teach the book that discovery. Other players could then read that book, for example titled "A book on Gold Bars" or "Chicken Feathers and you", to discover that item.
Some people would probably never use these, or just use a few useful ones like certain metals or plants, but I'd imagine that some people would build entire libraries, categorizing every item.
Maybe you could even go further and let people write down text in the books. It would be kind of a fun thing to read what players 6 months ago wrote down. Like maybe you could enter an abandoned village and you could read a village diary of when they built the brickwall, and when they got attacked by a troll.
The discovery books would probably not take too long to make, but could increase the fun of the game for collectors, the text book would probably be harder to implement however.
Sculptures
To spice up the aesthetics of your village, it would be fun if we could carve out sculptures of players, animals and other models in the world.

I'd imagine something like this: First the player builds a fundament. Then the player somehow connects the fundament and a present object. The fundament then becomes a buildable sculpture and the player can finish the sculpture by working, and adding the desired materials.
Ideally the sculpture would capture the exact animation frame of the current played animation of when the player connected the object to the fundament so that players could choose what their statue should look like, and so that every statue would be unique.
So players could make a sculpture of a fox made of marble in their garden, or other something more dangerous like a troll during an attack animation made out of gold, later to be sold at a heavy price to some collector.
Maybe there could even be different sizes selectable, (limited by a stat like psyche?), so that players could erect an enormous statue of their great leader, all so that their nemesis faction can come and tear it down later.
The models from actual animals could be reused, and the textures from materials could be reused. So implementation would mostly be about making a small system for copying a model to a sculpture. Maybe it would be harder to make player sculptures work properly since they'd need to store some information about clothes.
Ropes
To move larger statues out of caves, or other immovable objects, like knarrs, maybe we could make use of multiple players/horses with multiple ropes.

So for example:
An object with the weight 100 (a small rock) can be lifted.
An object with weight 200 (a big rock) can be towed in a rope by a player.
An object with weight 400 (a big statue) can be towed by a horse or two players.
And finally a heavy weight of 800 (knarr) can be towed by two horses or 4 players with ropes.
Probably the hardest implementation, since it introduces a myriad of possible bugs, like pulling objects through walls, and which direction the object would go if several players walked different paths.