This treasure map colouring page is detailed enough to keep older kids busy. There's not much free space, but they could draw on a few more of their own clues too?
Treasure Map Colouring Page
Imaginative play is just the thing! All you need is a cardboard box, some pirate props and away you go... This colouring page comes in simple and "scene" versions so you can choose the most appropriate for your children.
The pirate bear in this colouring page reminds me of Smee in the Peter Pan stories - Captain's mate! He certainly has a lot of pirate treasure...