「Make me a birthday card for my son that says HAPPY BIRTHDAY BUDDY」は FontVibe AI で作成したキッズバースデーの文字エフェクトです。子ども向けにデザインした、鮮やかなレインボーのカートゥーン風バースデー文字エフェクトです。1文字ごとに異なる明るく彩度の高い色を使い、ぷっくりとしたバブル型の文字、カラフルな風船や紙吹雪の弾ける演出で仕上げています。子どものバースデーカードやパーティーバナー、1歳の誕生日祝いにぴったりです。

Create a finished vertical 3:4 children’s birthday card, front-facing print composition. Render the exact headline in three stacked lines: “HAPPY” / “BIRTHDAY” / “BUDDY”. The words occupy the center 60% of the card in oversized custom helium-foil balloon lettering: extremely plump inflated forms, rounded corners, individually modeled seams, tiny tied balloon knots integrated subtly at lower letter terminals, taut reflective metallic skin, bright white oval specular highlights, soft contact shadows. Use alternating candy colors—hot pink, lemon yellow, cobalt blue, lime green, tangerine orange, violet—with each letter edged by a thick clean black cartoon outline. Ensure every character is legible and the spelling is exact. Above the headline, set the small centered line “FOR THE COOLEST KID I KNOW” in chunky black hand-drawn uppercase. Below the headline, set “LOVE, MOM & DAD” in rounded black handwritten lettering. Background: clear sky-blue field with a faint radial sunburst behind the headline, framed by an irregular arch of glossy foil balloons in pink, yellow, blue, lime, orange, and purple along the top corners and side edges. Scatter chunky five-point stars, curled paper streamers, tiny confetti rectangles, and two small cartoon hearts around the words; keep a clean breathing margin around all copy. Add a curved floor of pale aqua at the bottom with soft balloon shadows. High-key studio lighting, crisp black outlines, smooth 3D cartoon rendering, saturated color separation, polished foil reflections, print-ready sharp edges. No extra words, no age number, no logos, no watermark.