What you will need:
100% wool yarn for felting
A pantyhose or sock
Scissors (to cut yarn)
String (NOT wool yarn)
Washer & Dryer
This is the yarn I got
Step 1: Wrap the wool yarn around your fingers about 20 times
Step 2: Take the yarn off your fingers and wrap it the opposite direction about twenty times again
Step 3: Squeeze your little "bow" of yarn into a ball and start wrapping
Step 4: Continue wrapping, switching directions often until the ball is the desired size (usually a little bigger than a baseball, but smaller than a softball. I couldn't completely wrap my hands around my completed one)
Step 5: Cut the yarn and tie it off into the ball. Some people use a knitting needle for this but I just tied it on to a string on the ball and it worked just fine
Step 6: Stuff your un-felted dryer balls into the pantyhose, tying in-between each one with a piece of string of some kind. I just made a knot after each ball and it worked for me. Make sure you don't use the wool yarn, because it will felt and not hold it all together.
Step 7: Wash in the washer machine on hot a couple times, this part was annoying for me because we only have cold rinse so I had to stand around waiting for the wash to be done and start it over again. I washed them 3 times.
Step 8: Dry them in the dryer on the hottest temperature you have
And voila- here is the completed dryer balls!
Want dryer balls but don't have the time to make them? I am selling them in my NEW Etsy shop here, for a very reasonable price. The ones I bought were almost twice as much as these, so stop by there and see what I have left.