What you are going to need for this are 1.)Some old CDs or DVDs, 2.) Cereal box or any kind of cardboard 3.) Some tape, X-acto knife or any sharp blade to cut the CDs/DVDs.
Step 1: Cut the mirror
Warming the CD up first with a hairdryer for 2-3 minutes will prevent the CD from shattering.
Step 2: Cut Out The Periscope Body
Print the image scaled to 77%
(You are going to want it small because of the size of the mirrors. If you have bigger mirrors, then you can print out the patterns at 100% scaled.)
Rough cut (bubble cut) around the solid lines and stick 4 tape "doughnuts" to the corners of the non-print side. Tape the Pattern Onto the Cardboard and Cut out on the Solid Outside Lines. Keep the pattern taped on until you have cut and folded on the lines.
Step 3: Cut out Triangle Pattern
You are going to have to print out Two of the patterns below for the mirrors.
(Follow the same steps to print out the triangle pattern.) Scale to 77%.