Step 1: Find an appropriate "Y" shaped handle
Step 2: Cut and Prepare the Handle
Peel the bark off the handle by using the knife to separate the bark from the wood. this is easily done while the wood is still green.
Next use the knife to trim and smooth the knots and bumps on the handle, and trim the rough edges on the ends of the handle.
You then cut small grooves on the ends of the forks about 1/4 inch down from the top. The grooves keep the strings holding the rubber bands in place.