Certainly! Here is a sample letter you could write to your cousin:
Dear [Cousin's Name],
I hope this letter finds you well. I was absolutely thrilled when I heard the news that you won the first place in the Provincial Creative Writing Competition! Your talent and hard work truly shone through, and I couldn't be prouder of your accomplishment.
Your writing skills are exceptional, and I have no doubt that you have what it takes to excel in the upcoming All Island Competition. Remember to continue practicing and honing your craft before the next challenge. Your dedication and perseverance will undoubtedly lead you to further success.
Keep up the fantastic work, and know that your family is cheering you on every step of the way. Congratulations once again on your well-deserved victory!
Warm regards,
[Your Name]