I've always loved the B-movie classic "Robot Monster". Not only was the acting sub-par, but the titular monster was just a guy in a cheap gorilla suit wearing a space helmet. Since I already had a cheap gorilla suit, I figured I'd make a helmet to go with it.
Step 1: Step 1-Get a globe
I got mine at a local thrift shop for $5. I thought it would be made of plastic, but, lo and behold, it was made of cardboard.