有一天,英语音乐动画教育节目《Schoolhouse Rock》的制作人大卫·麦考夫发现儿子在记忆乘法表方面存在困难,他大受启发由此产生了制作这个节目的想法。节目以短片的形式在卡通片结束之后播出。其主题包括美国历史、科学、乘法表和语法等,配以便于记忆的音乐和歌词。该节目第一首歌《Three Is a Magic Number》由鲍伯·多洛作词作曲并演唱。鲍伯·多洛是美国的一位波普爵士乐钢琴家和歌手,同时也是一位词曲作者。 One day, David McCauff, producer of the English music animation educational show “Schoolhouse Rock,” found his son having difficulty remembering the multiplication table and inspired him to create the idea for the show. The show aired in the form of a short film after the cartoon was over. Its themes include American history, science, multiplication tables and grammars, along with memorable music and lyrics. The first song of the show, “Three Is a Magic Number,” is composed and sung by Bob Dolo. Bob Dolo is a Bop jazz pianist and singer in the United States, and is also a songwriter.