Surveillance Tools

Surveillance Tools

Crafty DetectivesCrafty Detectives has all kinds of directions for making detective tools. In it you can learn to to make a hidden camera, a trick wallet, an undercover book, alarms and a lot more.

    The marble telescope and the periscope are both devices to help you conduct secret surveillance. With a periscope you can see around corners or over walls or fences. With the marble telescope you can see through a keyhole. Really. Give them a try:

make-periscope

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