The General Mills scarf promo was the end of last year. 2 codes from a specially marked box would get you a free scarf. There were also codes on old El Paso kits or snack bars, however you couldn’t mix and match codes from different sources. There was a limit of 4 scarves per household so I ordered one each so we (me, dh, ds1, ds2) could all have a different one. We got all of our codes from family sized cinnamon toast crunch because my kids eat a tonne of it and we go through at least one box a week.

edit to add… I got the old El Paso taco scarf, dh got the cheerios scarf, ds1 got the nature valley tree scarf, ds2 got the lucky charms scarf. They are actually quite nice and decent quality. I usually don’t have high expectations especially after the super cheap low quality beach towels they had several years ago.