First off, why use wool?
1. Shorten drying time
2. Reduce static
3. Soften and fluff your laundry gently
4. Use in place of dryer sheets and liquid fabric softener
Some of the tutorials used store bought materials (aka 100% wool sweaters on tag day from Goodwill), others use a fragrance in the center and others still used fleece as the middle. One found most recently used tennis balls in the center and then a double felting process on the outside (saving on wool).
|pre-felted dryer balls|
Small amount of cotton string/yarn/thread
an old sock or pantyhose
Here's what I did: (so easy my kids were begging to join in the fun!)