OK so I know nits don't chek your date of birth before infesting you LOL but I wondered if there tended to be a minimum age that kids get them. I definitely have them for the first time as suspected. A good mate with school age kids told me yesterday that I needed to get the kit becaue they have them. DD 1 is at preschool, age 3. She has very fine baby hair, still a bit sparse and I can't detect any on her (or my 11 month baby).I thought maybe if the hair is too fine the little b**s can't grip? Anyway, I'll comb after using conditioner (seems that nits are becoming immune to the insecticide treatments anyway)