Clarinet was invented in Nurnberg, Germany, in 1690. Idea: The music teacher or a child studying the clarinet could perhaps show how the clarinet works. The children could look at other woodwind instruments.
Paper money was used for the first time in 1690 in the colony of Massachusetts. Idea: Children could debate the pros and cons of using paper money as opposed to coins. They can visit the Bureau of Printing and Engraving site: Paper Money.