Set of 36 non toxic hair chalk.

Section off the amount of hair you want to colour.
Spray the section of hair so its damp.
Apply chalk to the desired colour, using more chalk to brighten
Let air dry, this is very important.
Flat iron the hair to heat seal the colour in.
This chalk is non-toxic and will stay in the hair for 1-2 washes depending on your hair colour.
Hair colour chalk is temporary hair colour that rubs directly onto your hair, then washes out.