Many people like to apply hair dye, either for fashion or cosmetic reasons. This applies to boys as well, who might use dyes for the very same reasons as adult men and women. Getting streaks in hair -- as opposed to an overall dye job -- is pretty straightforward to do and gives a style boost to a boy or helps to correct a problem spot.
Cover the boy's head with the rubber skullcap that comes with the kit. This will protect other hair sections from unintentionally being colored. Cover the boy's shoulders with a towel to protect his clothing.
Choose which parts of the hair are going to be colored and insert the hair-pulling tool through the holes in the cap in that area, sliding the targeted hairs out through the holes.
Put on the rubber gloves that come with the kit.
Mix the activator, if the kit has one, with the dye. Follow the manufacturer's directions for proper mixing ratios and duration.
Apply the hair coloring with the kit's brush to the strands protruding through the skullcap.
Allow the treatment to set for the desired amount of time. Normally, the longer the dye sits, the deeper the color will be.
Remove the skullcap and wash the hair once more to finalize the process.
Wash and shampoo the hair until all the residual dye is removed and the water runs clear. Condition the hair after the shampoo using either your conditioner or the conditioner supplied by the kit, if any.