One night after drinking lots of alcoholic beverages, I decided that I was going to be Yoshi for Halloween and announced it. After sobering up, I had no clue how to proceed.
The end result
Slightly better shot of the head
Everyone was shocked that I pulled it off, I wish I had a better picture of the back to show the spikes and the shell.
The main body is a sweats set from target on sale, bought an extra pair of pants to make the tail and to cover the head. The head is an old baseball hat that i put in a box and filled the box with the expanding foam, Great Stuff. Once it was dry, carved the head out and covered with fabric. The tail is a leg of the pants cut at the knee and the existing waist band with the extra white fabric rounding out the tail shape. It was easily rotatable and removable so I spent all of Friday at work wearing this, and had no problems in the chair or moving around.