Emily Falconbridge taught our felting class at Spark last year. I absolutely loved, loved, loved this class. Had so much fun. Its easy to do, just takes time. All you need is the Felting Wool, soapy water (we used dish soap), bubble wrap, and a towel (cause you'll get wet). Emily has how-to's on her blog.
I made this scarf at spark and then with my leftovers made the bracelet and earrings at home.