Each episode featured three members of Morning Musume. During the first season, they would each episode introduce and briefly discuss a piece of urban culture. During the following two, they would demonstrate a simple science experiment, accompanied by a little skit in a surreal setting.

Morning Musume Tsuushin 03 - Abe Natsumi, Yaguchi Mari, and Yasuda Kei - Nail Goods (2002-04-16)

Source: http://wiki.theppn.org/Morning_Musume_Tsuushin