I don't know why this works, but if you include a few (clean) tennis balls in each dryer cycle. The tennis balls not only cut drying time by 25% - 50%, but also fluff the clothes to a delicate softness, and towels with be especially fluffy.

You can make it a game with the kids to find the tennis balls once the laundry is dry.  (They may even want to help you fold!).