In order for your child not to get head lice, your child should not be sharing any hats, helmets, or hair ties with another child. We all know how much girls like having their hair out, but in order prevent head lice, your daughters' hair should not be out. It should be tied up neatly in bun or braid, no loose pony tails. There should be no hair sticking out. All you need is one string of hair for the lice to grab onto to get lice. It only takes seconds for a louse to travel from hair to hair.