You Need 4 Leather, 1 Iron Nugget, 1 Gray Dye, 1 String. That Is The Recipe For An Elytra

You Will Need 1 Gravel, 1 Torch. That Is The Recipe For Gunpowder

You Will Need 3 Leather, 2 String. This Will Craft A Saddle

If You Smelt A Saddle It Will Become Leather