Include few mini-games that gives You NOTHING when completed. Just to pass in-game time when doing a chores, because it seems farming and stuff doesn't get any speed-uped late-game..
All of mini-games presented as in-game items, that normally are curiosities. Clicking on it starts the game. It doesn't stop player from currently preformed actions (example: doesn't stop player from harvesting farm) nor does it get cancel when preforming new action collecting harvested goods or starting another harvest action.
1. Game: Sliding Puzzles (from 3x3 to 5x5)
- Uses pictures of skills, lore, etc. as randomized puzzle. + board + pigments
2. Sudoku: so people can commit sudoku
- board + random pigment (replenish-able) + 1 use of soap (because why not)
3. Chess with player in visible radius (requires both players to have a set, acceptance window). *
- Crafted from mammoth tusks OR marble-basalt OR white/black pigment + any random stone + board
All of those should be 1x1 items. All of those should be average curiosities. If You really want a reward from completing a game like that, make it boost curio LP by 25%, next win decrease time by 25% and next win decrease mental weight, exp or whatever, then each next win doesn't provide anything.
Unless we go rewardless for completing such game, just make it client-side, so server doesn't get overloaded with people trying to be funny.
Only one game at a time.
*I know many people already speculated some guys would use AI to cheat but well, who cares? It doesn't matter everyone will do so.