My son wanted a Jake the pirate party. Here are the invitations.
We did a treasure map that led to different rooms in the house. Each room had a game.
The games were Alligator bean bag toss, pin the skull on the pirate ship, and the "island" walk (cake walk but stepping on islands). The treasure was hidden in a treasure box with an X on it, and inside were the party favor bags, and my sons birthday presents.
Here is where I got the ideas for the games.
The party favor bags had gummy sharks, marine animals, eye patches, rolled up coloring pages of Jake to look like a scroll, gold coins (candy/toys), and some light up rings.