great non permanent hair color [SEP] my son wanted to dye his hair blue ummmm no hair chalk was the perfect compromise it adds as much or as little color as you want it lasts one day i would recommend washing it out each night or you will wake up with it all over your pillowsuper easy to apply you can add in different shades of the same color to add dimension do all the same color or add as many colors are you like i love that this gives my kids the freedom to make their hair original but is not permanent and does not have smell like the hair spray colors do