needle felting

I want to learn needle felting to embellish felted slippers and purses. I would like to know what supplies I need to start learning how to do this. Any suggestions as to supplies and where I can purchase them is appreciated. Thank you.

Are you interested in making 3-dimensional object like this:
or in needle felting a design onto a flat surface like mittens, a sweater, a scarf? (see especially the second video):

I think that both videos give you an idea of the supplies that are needed, basically a surface, roving and a felting needle to get started.

No- embellishment for slippers. Thank you for taking the time to reply. I appreciate it.