A bright lakeside speedboat birthday invitation for a child's fifth birthday, drawn in clean flat vector style with bold outlines and a classic nautical red, white and blue palette. The design leads with a giant outlined numeral 5, a red speedboat cutting across stylized blue waves, and bold rounded geometric lettering for the honoree's name and party details. The matching guest page is styled as a boarding pass for the S.S. Little Captain: the invitation arrives as a punched ticket with an Admit One stub, a departure ticket-strip counts down the days, hours, minutes and seconds until the party, and the details are stamped into a Captain's Log with a full set of nautical row icons. Every section of the page is framed by hand-drawn wave seams, drifting seagulls, bunting and rising bubbles, and the RSVP closes the page as a dark evening sea with a life-ring seal. The page works beautifully on phones, tablets and desktop, and every detail row — date, time, venue, RSVP-by, dress code and parking — can be personalized before sending. Add the party address, share the link with the crew, and watch RSVPs arrive with the countdown ticking on the guest page itself. Ideal for a boat party, a lake celebration, a sailor-themed birthday, or any young captain who loves the water.