Looking Around Corners

The materials Needed:

2 small mirrors
triangular card
scissors
pen
tall, empty carton

Step 1
Use the triangular card to help you draw two diagonal lines on one side of the carton.

Step 2
Carefully cut a slot along each line. The slots should be just wide enough for the mirrors to fit into.

Step 3
Draw and cut two more slots on the other side of the carton.

Step 4
Carefully push the mirrors into the slots. They should fit snuggly, so that they cannot slide out.

Step 5
Draw a large square at the top of the carton in the front of the mirror. Carefully cut it out.

Step 6
Make a small hole with a pencil in the back of the carton. Now your periscope is ready.

Step 7
Look into the hole to see around corners or over obstacles.

Periscopes are used in submarines to allow the crew to see above the water while staying submerged. The periscope in a submarine works just like the one I made. There is a long tube that reflects light rays from the surface of the water down to the submarine.