I wrote out a poem and delivered it to "the Buccaneers next door" (the 4 cousins).
Legend be told
Of Blackbeard's gold
Hid on an Isle
In ocean cold.
Map that was lost--
Found at great cost.
Ship sent to search--
By wild storm tossed.
From East to West
As the Sun crests
Horizons far--
Where is the chest?
Brave the gale!
Find it or fail!
All Ye Pirates,
Finish this tale!
They were instructed to work together and not let anyone fall overboard (although there were several side excursions in the dinghy).
Thirteen clues then led them through obtaining fuel for their voyage (the propane tank), gathering grain for bread and rum (the crib--Yes, I know beer is made from grain and rum is made from...whatever rum is made from. I was working with what I had.), a bell tolling, an old iron horse, soldiers in the fort...until they found the treasure and were instructed to divide the spoils equally, or risk the Black Spot.
It was great fun, and, for the moment, I'm a cool Mom. Oh, yeah.