Every man deserves a gold bar. And every dad deserves two.
Buy a little box and a big fancy bow and maybe throw in a magnifying glass because gold bars this cheap aren't very big. For less than $25, you can buy Dad two 1-grain 24k bullion bars, available from Amazon.com, PLMGOLD.com, or online auction sites, like eBay or iOffer. One grain is about 1/480 of an ounce, and is about half the size of Lincoln's head on a penny.
This gift is for dads who can admire understated beauty. Plus, if he times the sale just right, maybe one day he can afford that new grill.