Cannon Ball Game
Aaargh! Me matey! Pirates band together to sink the ship, by firing the cannon ball with the catapult.
A player get 3 shots, and whoever makes a strike is a winner. Keep playing by taking turns.
Perhaps make a rule that at the end of play, the one with the most strikes is the grand winner, perhaps for a prize eg. one of our pirate rings or badges.
For more difficulty, you can give a high score for striking the SHIP, which causes sinkage, and a lower score if the top targets are hit, which won't sink the ship.