Airheads are a taffy candy made by a Dutch-Italian company that we are not going to try to pronounce, in Kentucky USA.  They come in a long coloured bar, individually wrapped, but can also be found in bags in smaller pieces.  The “Xtremes” have a tangy sour taste.  Interesting Wiki fact; the production process for the bars is similar to that used to make Play-Doh.  We think these taste better.