The edges on the coasters aren't completely straight. I could have cut them for a smoother edge but I personally like the look of the natural felting. Once I felted the coasters into square-ish shapes I began the needle felting. It's way easier than I was expecting, just keep stabbing away with a felting needle! Just make sure the object you're felting onto is resting on a surface that you can stab on. I put my coaster on a thick (new) kitchen sponge and it worked perfectly. I noticed they sell special "stabbing boards" at the craft store but they just looked like giant sponges. I opted not to spend the $10 on one and used my cheap-o sponge instead. It was great. Felting is great. Wool is great.
And, of course, weekends are great.