Gather up several dozen maple seeds--commonly known as 'whirlygigs' for how they fall, helicopter-like, to the ground. Dry them well.
Hold the propeller, or body, of a whirlygig in each hand, over a clean white paper or cloth.
Rub the seed pods together, to loosen all the tiny slivers of hair that coat the pod.
Repeat this process with several seeds until you accumulate a teaspoon of fine slivers.
Store this powder in a tight, spill-proof container, and secure it in a safe location.