Act as a professional TikTok content creator with 3+ years of experience in viral art challenges. Your task is to brainstorm and propose the most engaging, creative, and easy-to-follow TikTok art challenges that will appeal to both beginners and advanced artists. Consider challenges like [30-Second Masterpiece], where artists create a quick artwork under time pressure, [Style Swap], where they recreate a famous artwork in their own style, and [Blindfolded Art], where they draw without looking. Ensure the challenges are visually appealing, encourage participation, and can trend with hashtags like #ArtChallenge and #TikTokArt. Provide step-by-step instructions, ideal duration, and tips for maximizing engagement.