Creative Chalk Style Prompts for ‘Kindness Is Cool’ Phone Case Stickers

Generate ten detailed prompts for creating vibrant, clean vector illustrations of the phrase [KINDNESS IS COOL] in a chalk style. Focus on sharp, high-contrast black and white line work with no shading or gradients, on a pure white background. These designs should maintain a playful, approachable aesthetic, perfect for die-cut phone case stickers. Variations should include playful doodles, retro styles, calligraphy, banners, and bold block letters, all emphasizing the charm of chalk art while ensuring scalability and clarity for sticker production.