One easy outdoor camping craft awaits you In The Willow Whistle book you will find step by step illustrated instructions, on how to make a willow whistle. For a fun and exciting camping craft to do with your family, you can't beat this one. Hours of fun await you with this book and a common pocket knife. The author herself is still making willow whistles with the neighbor kids and her young relatives. People of all ages can enjoy this even grandpa.