Step 1: Tools needed
A small whittling knife or a chip knife is the best suited for the carving. But any small sharp knife will do the job. And a bigger knife is needed to split the wood into the 4 pieces needed.
I use my hand forged knifes and a pull saw.
If you don't have a suitable knife already I recoment you buy a pfeil or a flexcut I have used both brands and they a both very good. And they are available many places online.
Step 2: Preparing and splitting the wood
You can use any kind of green wood. I can recommend alder, hassle and willow for beginners. They are easy to come by, they are soft and grow straight, and therefore are easy to carve.
For the more skilled and experienced you can go for the harder kinds of wood like black cherry, apple, mayflower or maple. Or yew if you can get your hands on some.
Yew and alder are even soft and easily carved after they dry and the wood have cured.
Step 3: The rough cuts
Step 4: The fine cuts
Step 5: More inspiration
I hope you enjoyed this instructable. Feel free to write me with comments and questions.