With Father’s Day just around the corner, we got to thinking about all the things we’ve gotten too see grow up over the years—our pets, our wallets, the characters on Mad Men—and how we’ve grown to love those things (well, except for Betty Draper). Then we found out about Railcar’s new super-limited-edition denim project. The good folks at Railcar Fine Goods have gotten ahold of some really choice light brown selvage denim, with which they plan to make one round (and one round only) of their signature Spikes fit jean. Even the craftsmen themselves don’t know exactly what the finished product will look like. But here’s the beauty part: Railcar is going to document this one-time-only process from start to finish, via their Facebook page…so you’ll get to see your pair of jeans take shape before your very eyes. But since stock is extremely limited, you’d better reserve your pair now. It won’t be the stork who drops them at your door, but rest assured, you’ll be one proud Papa. Reserve here.