Under-the-sea-themed 1st birthday party for boys featuring ocean-themed desserts, a sea life balloon arch, and a blue and white "Wave is One" sign with sea creature decorations. Baby 1st Birthday Party Ideas, 1st Birthday Party Ideas Boy, Birthday Theme For Boys, First Birthday Themes For Boys, First Birthday Theme Boy, 1st Birthday Boy Themes, First Birthday Theme, Baby First Birthday Themes, 1st Birthday Party Decorations