I'll echo the advice to use your grandfather's flag and medals to make a shadow box to honor his service. My grandfather wasn't allowed to enlist due to being in a vital occupation. He raised and lowered a flag everyday for as far back as I remember. When he died I got that flag and it now sits in it's own display box on the top shelf of our home desk. The flag I received upon retirement will go into a box with my medals, qualification badges, and any other acoutrements I think should help represent my career.

YMOS,
Tony