Mermaid Underwater Fantasy Birthday Decoration

For a magical, underwater adventure, the mermaid theme is perfect! Decorate with an ethereal blend of turquoise, purple, and pink balloons that mimic an underwater scene. Add iridescent “scales” on the walls, seashell decorations, and a balloon arch with starfish and coral. The kids can wear mermaid or sea creature costumes, while the adults can join in by adding ocean-inspired face paint or glitter. Serve themed snacks like seashell cookies and “ocean water” drinks with tiny umbrellas for a fully immersive undersea celebration!