Some of you already know how, but I made a DIY spin top string video:
By "3-ply" I mean if you pinch the string and unravel it a bit you see 3 strands of twisted sting, instead of two like a yo-yo string.
When I was teaching yo-yo workshop, nothing bothered me more than to see a kid with a dirty, nappy, knotted string. For those of you in need of string that can't bring yourselves to order some from Spintastics, yoyonation, or Jeromy K, give this a shot. I don't want to take business away from these fine folks, but this is also a craft that I think some folks will enjoy doing.