Younger children can trace between the dotted lines to create their own "treasure island" picture - perhaps choosing an appropriate colour of crayon or pen for each section. Older kids can simply trace over all the lines for more practice.
Treasure Island Tracing Page
Trace between or over the dotted lines of this Jolly Roger flag. Watch out, though - there must be pirates nearby!
Trace the lines of this pirate hat, complete with skull and crossbones, for plenty of pencil control practice.