In "Mailing Things is Fun", the author shares a personal journey into the joy and significance of mailing letters and postcards. Beginning with a playful endeavor of communicating with a family member during a time of isolation, the post emphasizes the art and thoughtful nature of mail over digital communication. The author encourages readers to embrace writing letters as a meaningful, artistic practice that fosters genuine connections in an age dominated by quick texts. It's a nostalgic reflection on the joy of tangible communication and its emotional value.