Spool knitting is an old craft that can be used to create cords that are almost identical to i-cord. In recent times it has resurfaced in a larger form and is called loom knitting. You can get loom knitting kits at most yarn and knitting stores, craft stores and major department stores (with a craft section). I made spools for all the students in my class. The older students spent two classes learning about spool knitting, knitting lovely cord and eventually making a beautiful beaded bracelet.
The spool knitters are made from common household items. I am confident you have everything you need to make one at home right now. The directions to make the spool knitters are contained in this PDF document How_to_make_a_spool_knitter_PDF.
If you have any comments or questions, just leave a comment below.