Here's something very easy that will likely make anybody in your life who sews clothing and doesn't have one very happy.
I went to buy one of those things and they're close to 40 bucks. It's about 16 inches long, an inch thick, and if I've translated the dimensions properly (they're metric on the drawing) can come out of a piece of 8 inch wide stock. Two pieces plus some dowels or screws or dominos to hold them together (or you can just cut tenons).
It's used for pressing details on tailored shirts and other clothing, so you want to make it out of something that will take a good enough finish to not snag the fabric--the commercial ones look like red oak.