HERE for a tutorial on how to make dryer balls from wool yarn.Go
Most commercial dryer sheets are impregnated with all sorts of toxic chemicals including Benzyl Acetate, Benzyl Alcohol, Chloroform and Linalool; none of which are good for the environment - or you. Some of these compounds are known carcinogens.
Aside from the chemicals in the sheets winding up in your clothing and therefore next to your skin, when heated, the fumes are also toxic.
If you're looking for a greener alternative to dryer sheets; here's a great alternative. You not only will be saving money, but you will help your self and the environment.
Just throw them in with your laundry in the dryer and they'll take out the static.
(Thank You Sugar Bee Crafts)