Felted wool is a durable material that is particularly suitable for needle felting activities. It's a natural material that can be used to create small creatures as it retains a memory of the shape by contracting when heated. This kit is a great introduction to the world of felting. It's a great way to learn about the process and also to try it out to see if you like the process. It's a good way to get started if you've never tried needle felting before.