Here’s an interesting flea market find: a 1941 Boy Scout Round Up neckerchief from Kansas City. According to “Trail to Eagle: Six Decades of Scouting in Kansas City 1910-1970,” Kansas City began hosting annual Boy Scout Round Ups in 1912. The book states that it was an indoor event intended to showcase Boy Scout skills (pioneering, first aid, firebuilding, etc.) and that the Kansas City event was the first of its kind held indoors.
The neckerchief is a standard-issue Boy Scout neckerchief with a stencil/block print on top. It could have been made on site and available to the boys or possibly made by a troop to wear during the event. I’ve never seen an item similar to this but would enjoy seeing a picture of yours if you have one.