"OPEN STUDIO" é um pôster em estilo cartoon plano para uma sessão de arte infantil sem inscrição. Letras maiúsculas arredondadas em coral ficam acima de uma menina sorridente de avental vermelho pintando uma flor amarela num cavalete, com paleta, copo de pincéis e folhas verdes, e uma pílula azul com "Saturday 10AM" embaixo. Troque o título, o lema, o dia e a hora ou a frase final para criar um pôster do seu próprio ateliê.

Create a bright, finished square Instagram event post in a modern flat-cartoon vector illustration style. Use a warm cream background with a few simple coral, sky-blue, mint, and sunny-yellow organic shapes, tiny sparkles, and circles. Keep the palette to solid colour fills with crisp colour-against-colour edges, no heavy outlines, no gradients, no gloss, and only one soft darker shadow tone per shape. Add a faint hint of grain only in the background. Top-center, set the exact headline “OPEN STUDIO” in large, bold, friendly rounded sans-serif lettering with generous open counters and softly rounded terminals. Below it, in smaller uppercase rounded sans, set “PAINT · PLAY · BLOOM”. Keep all text clean, correctly spelled, and highly legible. Make the central illustration the visual hero: a cheerful original girl shown from the waist up, with a round face, dot eyes, a small curved smile, simple hair, and a brightly coloured apron. She is actively painting a large yellow flower on a small upright canvas; the flower has a bold round golden centre and broad sunny-yellow petals, clearly the biggest object in the illustration. Show her holding a paintbrush near the flower. Use simple solid shapes and friendly expressive body language, no anime features. Place the girl and canvas in the middle of the composition, framed by a few small palette-coloured leaves, dots, and sparkles. At the bottom, set “Saturday 10AM” as the clear event detail, then a smaller call to action “DROP IN & CREATE”. Center all text on one vertical axis, with comfortable separation between text and illustration. Bright, welcoming, playful, polished, and readable at phone-feed size. Include no other words or lettering.