Eggshells might look like nothing more than kitchen waste, but once you learn what they can do, it’s hard to see them the same way again. Instead of tossing them into the trash, you can turn them into a useful, low-cost resource for your home and garden with just a little preparation. Because they’re naturally rich in calcium and have a sturdy texture, eggshells can be repurposed in surprisingly practical ways. Best of all, this simple habit supports a low-waste lifestyle without needing special tools or expensive products.