A number of activities loosely related to spying have been put together by Planet Science. They feature codes, invisible ink, listening, telephones, interrogation and microdots, some of which are practical experiments. Each activity is related to the associated science. They can be used at home or in the classroom.
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Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.