第20話: 千空と石神村が春の完成を目指し、金細線の開発を進めながら携帯電話の建設を開始する

20

Senku and Ishigami Village begin work on the cell phone, planning to complete its construction by spring. To manufacture gold filaments for wiring, Senku creates a cotton candy machine to test with sugar. Senku brings cotton candy to Homura, who has been spying on the Kingdom of Science. After running into imperfections making filaments, Senku develops a gear train for the cotton candy machine, inspiring Chrome to construct a waterwheel with Kaseki. Senku then connects the waterwheel to the power generator, turning it into a hydroelectric power plant. (Source: Wikipedia)