Hello! Claire here from South by North. Here is a simple little diy project to add some colour to a parcel.
Cut two metres of cotton string, or however much you need. In two glasses, add a few drops of different colour natural food colouring to water, it should be quite strong so you only need a small amount of water. Drape half of your string in one glass, and the other half in the other, leaving the middle portion out of the glass. It helps the string soak up the colour if you press it into the liquid.
Take the string out of the liquid and squeeze the excess out over the sink. Lay it out to dry. Once it is totally dry you can use it on anything! Word of warning, if you get the string wet again the colour will likely run.