Old Jeans

I have a pair of {expensive} jeans. I wore them often for almost 4 years. Then they got a hole, simply from wear. Now it's not in a place that I can still wear the jeans. They are unfortunately, unwearable.

They have silly, sentimental memories for me. I bought them with my sister-in-law. She totally talked me into them. And I loved them for years. And am currently DYING for another pair. {David Kahn if you're wondering}

What kind of projects are there for old jeans. I can't throw them away. I don't need hole-y jeans sitting in my closet. What can I do with them?