Got your attention with the word 'free'? :-) I was watching "Sewing With Sue"- if you have a sewing machine then you also have a felting machine at no additional cost! Her guest said to remove the bobbin case, use no thread and run the sm at a very high speed- then you have a 'free' felting machine from your sewing machine.
Cool! Another technique to play with!
Leslie & The Furbabies in MO.