I couldn't believe how much wool dryer balls were going for ...$18...$30...no thank you! Especially when you can choose from one of the MANY tutorials all over the internet. I used the tutorial from These Light Footsteps.
This is a very quick and easy project. My dryer balls were made and put into service within a few hours.
I picked up a bag bag of wool yarn at a thrift store for about $3. This was all labeled "Tapestry" and "Needlepoint" yarn but it was all 100% wool.
Since the yarn was thin, I mixed colors and put 4 strands together to wind my yarn balls.
The end of the yarn was tucked into the ball.
All of the yarn I bought made 4 balls.
After running them through the hot dryer a couple times, I had felted wool dryer balls!
For the initial drying period, the felted wool balls were put into old pantyhose with a knot tied in the hose between each ball. This kept the balls from felting to each other. 30+ laundry loads later and I haven't used a single dryer sheet.
I have noticed the lighter loads of laundry drying a little faster but heavier loads (towels, denim, etc) don't seem to make much difference.
I think next time wool goes on sale, I'll pick some up and make some felted wool dryer balls to give as gifts.