Make a splash with the Mermaids Under The Sea 5pc Foil Balloon Kit! The ombre blue design provides many accent colors for decoratiing so be sure to search through our decorating kits to perfect your underwater oasis theme. Includes (5) Foil Balloons. Note: balloons ship flat. The Mermaids Under the Sea 5pc Foil Balloon Kit includes (5) 18" Foil Balloons.