Ombre trend isn't new , but it doesn't make it any less attractive, im not sure when it started or with what , if it was clothes first, then jewelry and then hair or any other way round.
a few days a go I was asked if the ISK technique is achievable for an 8 year old, luckily I could answer from my own experience , when Hagar, my daughter, was about that age I taught her to wire crochet in my technique ! coming to think of it, she was my first student ! but hey ! keep in mind that not all kids are the same , as not all adults are.