Backgammon. Easy to learn, fun to play. Ruthless version of ludo. Optimized for gambling. True warfare.
Slings. Not slingshots. Easy to make weapons that are potentially surprisingly effective. Take a long time to learn, but it's relaxing. How to make a staff sling.
Cool resources:
Digdeeper. Great articles on privacy. Essential if you want to survive the internet nowadays.
LandChad. Stop relying on others for internet services and claim your own piece of the frontier.