2. Print it
3. Cut it
You can make it in paper, but cardboard is sturdier.
4. Assemble the glasses
By sticking the pieces and folding according to indications.
5. Cut the cellophane
Use red and blue cellophane, and cut it a little bit bigger than the holes in the glasses.
6. Stick and fold
Stick the cellophane to the inside of the glasses, and then fold the glasses. Please note that the red cellophane should match the left eye, and the blue cellophane should match the right eye.
7. Look at the 3D video!
Wearing the glasses, move towards or away from the screen until you can appreciate de 3D effect.