It is a passion for someone to craft miniature versions of items, products. This is a similar work which results in cute looking tiny baby clothes produced in crochet style. You might be confused about the intended use of these tiny items but you can use them as decoration products.
You can craft and sell these tiny items if you know how to crochet. Since it requires an elaborative work, you can sell this items for good prices. You can list your products on advertisement websites or web marketplaces. They can be used as nice gifts.