I have these slippers in a basket at the front door of my house. When people come to visit they have something warm to put on their feet. The basket sits on top of a forced air heat duct and so they are always warm.
Actually they are usually scattered around my house because occupants have been wearing them. This pattern was easy to follow and I would recommend this particular pattern from knitty.com to someone who wants to learn how to knit socks. You can practice the different skills that are involved and not worry about the result because felting eliminates any kind of mistake. So if you want to learn how to make socks start with this.