Oh I love coming up iwth ideas ofr parties!!
You could do a great poem on the invites:
Ahoy Mates.
Jack's turning 2 and John's turning 4.
Shiver me timbers and yo ho ho
We're having a party and hope you can go.
OR
Let's set sail for a land far away
Where only poirates can live and play
We'll search for treasure til the end of the day
And have a blast at Jack and John's birthday.
OR
We've heard a tale of a buried treasure chest
So wear your patch and your pirate vest
We have a map to guide the way
Come ready to hunt and John and Jack's birthday.
Ship sets sail at 10 am from (Last Name)'s Island
RSVP to First Mate at ###-###-#### or you'll have to walk the plank.
Give all the kids eye patches from the party store and you can put out goldfish, Pirates of the Carribean fruit snacks, serve red Kool-aid (sharks blood).
You could "bury" fake coins in the sand box and have them hunt for buried treasure.
Get a treasure chest at the party store and fill it with trinkets. These can be your prizes. The kids can go pick what they want from the chest.
You could get black plastic cups and poke a hole in the bottom of each cup. Attach a silver pipe cleaner through the hole and make it look like a hook. The kids could make these as a craft or you could just hand them out.
Hope this helps.