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How to Make Spy Gadgets | How To Do Just About Everything Home Hobbies, Games & Toys Hobbies Other Hobbies How to Make Spy Gadgets Surveillance equipment and spy gadgets have become increasingly more sophisticated. With the creation of spy movies, the excitement for spy gadgets continues to grow even more popular over time. It is possible to make many of the basic spy gadgets in your own home. Just be sure to use the equipment for legal purposes. Use these instructions to make a spy telescope. You will need: narrow cardboard box, duct tape, 2 small mirrors, xacto knife, marker. Seal the ends of the box with tape. Cover the whole box in tape. Lay a mirror on one side of the box. Outline the mirror and cut out shape. Cut out the mirror shape. Do the same thing on the opposite side of the box. Cut diagonal slots for the mirrors to sit in. Both mirrors should be at 45 degree angles to each other. You should be able to see one with the other. Slide the mirrors into the slots. Tape them in place.