Helper notes and answers
This document is an invention for devices that were used by spies in the Second World War. They used these types of inventions to sabotage places or information in Nazi Germany.« Return to Introduction
Take a look at this document and think about these questions. You might want to print a copy of the document and circle or write notes about what you find.
- What can you see in the document?
- What type of device is hidden in the chocolate?
- Why do you think this has been invented? Can you think of a time in the past when inventors would be encouraged to think of ideas like this?