You will need the following parts:
Several cardboard toilet paper cores
Clear plastic packaging
A washable marker or highlighter
A medium sized paintbrush
Some sort of paint
Step 1: Cut out the base components.
Coat the outside of the cardboard segments in Mod Podge and wrap a layer of aluminum foil around them. (see second image.)
While these are drying, go root through the trashcan until you find a discarded plastic package. I used the flat part of a package that contained headphones. From this you will cut lenses using one of your toilet paper cores as a cutting guide (see third image). Make sure to cut inside your guide lines so the lens wont be bigger than the eyepiece (see fourth image.)
Now take one of the remaining cardboard tubes and cut it in half length-wise and round off one end of each half (see fifth image.)
To make the bridge of the goggles, cut yet another cardboard segment in half length-wise. Using a cardboard segment as a guide, mark a half circle on one of these and cut everything inside that half circle into tabs (see sixth and seventh images.) Make sure to cut out room for the bridge of your nose (see eighth image.) (NOTE: I had to use a cardboard segment that was a bit longer than 2 inches as I have a wide face.)
To make rims for your goggles, you can use polymer clay, PVC, milk cap rings or any circular object that will fit over the end of your eyepieces. I used black polymer clay. I made a donut shape out of clay and used a cardboard tube and a cookie cutter to fashion 2 rings (see ninth image). I then baked the rings according to the instructions on the package to make them hard and durable.
That's all you need to make them. On to assembly...