These are fun items to make and children of all ages love them.
Below are my instructions for making them for another set of instructions go HERE This is a PDF file by Eugen Schlaak, this is where I learnt from.
Materials and tools
A hardwood Ball 35mm diameter, A piece of hardwood dowel 6mm x 2 ¼” long, these can be made but I buy then from good craft/model shops.
You will need a suitable chuck and jaws to hold the ball and a piece of leather to use between the ball and jaws this is to prevent the jaws leaving marks on the ball. A Jacob's chuck, A 7/8” or 22mm Forstner bit, a 6mm Drill bit, super glue, a piece of card 5/8” wide and a skew or other tool to part off the finished item. Also I use a cone drive in the tail stock to help center the dowel when gluing it in place, if you don't have one of these you can make on out of wood to fit your usual tail center