Probably the simplest of sticks to make once you have found a suitable ‘v’ on a good shank.
I love the job of tidying the knots in the wood and carving a suitable thumb rest that it both aesthetically pleasing and comfortable for the user. All I use for these sticks is my favourite knife then some sandpaper to get a smooth finish. Then a few costs of boiled linseed and you have a lovely hazel thumbstick full of character!