I created these headings for my pirate themed word wall last year, and just wanted to share them for free, in case they may be of use to others. The letters are each on top of a treasure chest. I cut them to the size I wanted and backed them with construction paper (black for consonants, yellow for vowels) before laminating.
I intend to create word wall words (atop gold coins) later for first grade. So, if you're interested, check back in August. :)