I understand what you are asking and I have to say I felt the same way, "why can't I used affordable craft felt?" However, I did purchase some small pieces of wool and it 'molds' so nicely when you are doing applique. I found it to be very forgiving also. I purchased small quantities of it in a variety of colors through some Etsy shops. When I went to our thrift store I found it hard to find 100% wool but that could just be my area. Like someone else said you will probably find it well worth it to take the class. You can always decided not to take anymore. Have fun.