Mermaid Birthday Party 🐚🧜‍♀️ | Three Under the Sea Party Details Let’s shellebrate! 🎉 This Mermaid Theme Birthday is packed with magical party details—perfect for a Three Under the Sea celebration! From the pastel balloon garland with mermaid tail, to the shell cake toppers, glittery “3” candle, sequin mermaid outfit, themed tableware, and the cutest invites and banners, everything is under-the-sea perfection. This setup is ideal for a toddler or preschooler’s birthday party that’s colorful, girly, and full of sparkle! mermaidbirthdayparty threeunderthesea mermaidtheme ltkbaby ltkkids birthdaypartyideas undertheseaparty toddlerbirthday girlybirthdaytheme balloongarland mermaidoutfit birthdayinvites mermaiddecor birthdaytablescape pastelpartydecor letshellebrate ltkparty LTKParties LTKKids LTKFamily