When my older children first studied the Sumerians years back, I made tablets out of clay and let them decorate them with triangle shaped wedges. Later on, when we were studying fossils, I was inspired to let them make their own fossils by pressing objects into left over gingerbread cookie dough to make an impression before baking. We then dusted the "fossils" with powdered sugar so they showed up better.

Thus, we come to sugar cookie cuneiform. I really like projects you can eat, because the kids still get to have fun, I don't have to store a bunch of junk precious treasures, and no one is upset because I threw away the project they worked so hard on.

Writing In  "Cuneiform"

If you decide to do this project, be sure to take pictures before baking. The dough puffs up quite a bit and the writing doesn't show up very good after baking.

You can find more ideas like this on my Ancient History Lessons page on Squidoo.