: Constant bartering. A favorite of my kids. Catan
: Venerable "oldie" that has trading of resources and can be played by an 8-year old. Sheriff of Nottingham
: Bluffing and bartering. Between Two Cities
: Semi-cooperative game in which you have to negotiate with both your neighbors where to place each ones buildings. Pick Picknic
: Negotiate with the other players how to share the "loot" or roll dice to fight it out. Probably the most kid-friendly one of the games I suggest here.