acoustic, fun, casual, playful, children, whistle, guitar, kids, ukulele, happy, upbeat, interesting, energetic, lively, game, bouncy, easy
不插电，乐趣，休闲，俏皮，儿童，口哨，吉他，孩子，尤克里里，快乐，愉快，有趣，活力，活泼，游戏，轻快，轻松