This gun was a commission from the game Ratchet & Clank. Almost everything you see was made of EVA Foam, glued together with contact cement, sanded down and shaped with a Dremel.  For extra support, 

such as the blades, I added a piece of PETG in-between. PETG was also used for the areas that light up, which was then painted with glass paint, and filled with blue organza to help defuse the lights.