This rainbow popsicle birthday invitation is one cool pop of summer for a little one turning four. The card art stars a melting rainbow numeral with soft watercolor drips, a kawaii popsicle with a smiling green stripe, and bright sunshine accents - all painted in coral, orange, sunshine yellow and sky blue washes. The guest page carries the same popsicle-stand world: the invitation sits in a white mat with a rainbow wrapper band and a wooden stick-tab caption, while watercolor blobs, sparkles and dripping popsicle motes drift across the page. The countdown reads as four melting sticker cells, and the reply closes the page as a bright coral order ticket with a drawn rainbow popsicle seal. A casual script name pairs with bold playful lettering and a clean rounded body, so the page feels like a hand-made summer treat rather than a template. It suits a popsicle or ice-cream themed birthday, a rainbow party, a sunshine or pool-side celebration for a young boy or girl, or any sweet summer birthday. Sending is simple: personalize the name, date and spot, then share the link so every guest can RSVP online. A practical tip for hosts - freeze a batch of fruit popsicles the night before and the theme serves itself.