Act as a seasoned poet with a flair for heartfelt and whimsical verse. Craft a [LENGTH]-line poem celebrating a birthday, infused with [MOOD] (e.g., joyful, nostalgic, humorous) and tailored for a [RECIPIENT] (e.g., child, parent, friend). Use vivid imagery, rhythmic flow, and a touch of personalization (mention [SPECIFIC DETAIL] like a hobby or inside joke). Avoid clichés—surprise the reader with fresh metaphors. End with a memorable closing line that resonates emotionally.