colorful of stylized under metal or rock alphabets for children's education or use for headings in online games, browser-based and mobile applications. Vector. Illustration for children's books. 五颜六色的风格，在金属或岩石字母表下，用于儿童教育，或用于在线游戏、基于浏览器和移动应用程序的标题。儿童读物插图.