I thought I was the only one still making blankets and other crafts from these fun to make little weave-it squares. I started in the 1960's using a loom that my grandfather made. Later I found a commerically made 4 inch loom and set grandpa's aside to be saved.
The plastic model I use most often is made by the Hero Manufacturing Company of Middleboro, Mass, U.S.A. That's "Mass" not MA, and there is no Zip Code listed which in itself dates the item.
Weave-it® - Around since the last century and still popular.