-A knife (carpenters or hot knife, or even a scroll-saw)
-Computer with printing capabilities
-Hot glue & Glue gun (I prefer one with low/high temperature setting so that you can quickly join parts and avoid burns)
-Paper, pens, ruler etc.
-Plasti-Dip, and spray paint
-A dremel.....very, very, VERY helpful.
-And of course.....the foam! I typically use EVA foam from three retailers which are all a little different in terms of composition.
Home Depot-> Thinner foam that bends easily, has a diamond pattern on the reverse side.
Lowe's-> Thicker foam that doesn't bend as easily, very durable and has a hatched pattern on the reverse side
Harbor Freight->Thinner foam that bends easily, has a hatched pattern on the reverse side
Now that you have got everything, Lets Begin!
Step 1: File Collection and Printing
Ok, once you have the file, open it in the viewer and hit "Print". When all is done, you will have something like a pile of pages filled with polygons. Excellent, these will be your templates to trace on the foam.