This is not to difficult to do but dose require some time and creativity
so lets get started
Step 1: Things you need
plenty of cardboard.
two milk jugs.
Step 2: Template
I used the program called posterazor to make the tempplate but you can just download the attached PDF if you are about 6ft tall otherwise download the program and find a picture of a cyberman and set it to your size. I used the one below.
Step 3: Taping and cutting
when gluing them together put a piece of cardboard between them.
I used bike wheel tubing for the staps but any thing would work.
used Velcro on one of the straps so I could get in and out of it.
Step 4: Arms and legs
Duck taped the two sides together so it would stay on.
added a wrist blaster with a disposable camera flash (I will try to upload a instructable on that soon)
ok I know they don't look exactly like the real thing but it works.
pretty simple just look at the pictures.
Step 5: Helmet
This was the hardest part mainly because of the trial and error and because and didn't have much to work with.
The front is just a milk jug with a few pieces of cardboard on it.
I used the picture to cut the face plate.
sunglasses lenses for the eyes.
and a few blue LEDs in the mouth.
The pipes are made of poster board ( too cheap to use PVC :P )
The top is a spay paint can.
The back is part of a milk jug with some Velcro and poster board to finish the dome.