This watercolor pirate birthday invitation sets sail for a little one's fourth birthday with a hand-painted ship riding gentle waves. The card art stars a wooden pirate ship with a cream sail carrying a big red numeral, a treasure chest spilling gold coins, and an anchor with rope - all painted in soft ocean blue, crimson and sandy gold washes. The guest page carries the same treasure-map world: the invitation sits in a parchment plate with rope hairlines, compass corners and a wax seal, while bubbles and drifting doubloons rise up the page. The countdown reads as four postage-style dispatch stamps, and the reply closes the page as a deep ocean-blue panel with a gold crossed-swords seal. Flowing calligraphy for the honoree's name pairs with bold display lettering and a clean sans body, so the page feels like a ship's log rather than a template. It suits a pirate or sailor themed birthday, a treasure hunt party, a nautical celebration for a young boy or girl, or any little captain's sea adventure. Sending is simple: personalize the name, date and port, then share the link so every guest can RSVP online. A practical tip for hosts - scatter a few gold chocolate coins at each place setting and the treasure theme carries itself.