All our yarn kits come with the yarn needed to complete the project plus a project bag.
You will find two add-on options on the yarn kit pages; one for the pattern and where available a second option of a project workshop. Project workshops come with the pattern so it is not necessary to include both add-ons.
We have kept yarn kits separate from the pattern so that you don't need to purchase the pattern if you want an extra yarn kit. It also keeps the option open for you to purchase through Ravelry instead if you wish.