AccuSharp 2-step knife sharpener, a great little tool that can be used by anyone! It has 2 ceramic rods on which you can sharpen knives.
The dark is for rough grinding and the white is for finer grinding following the rough.
The great thing about this sharpener is that the ceramic rods are build in so you always get the best angle. Moreover it also has a great grip making it much easier to sharpen your knife.