I will be doing just that with some friends of mine soon. We will be making all-twine knotted Rosaries and donating them to the Rosary Army. The "Army" gives them away free as part of their mission to evangelize the Faith. Any individual of any faith from anywhere in the world can obtain one.
The Rosary Army also does public speaking and they produce Catholic audio and video podcasts for educational purposes freely available on their website. I have not listened to them yet, but I hear that The Catholics Next Door and That Catholic Show are good. Check them out at http://www.rosaryarmy.com/ and http://gregandjennifer.com and http://thatcatholicshow.sqpn.com/
image - http://www.rosaryarmy.com/