Tips to make teenagers look more like teenager?

I don't use height sliders. I'm pretty much the same height as an adult as I was a teen so to me it's a bit silly. I've always been shorter than just about everyone else since I was 12 and I often got mistaken for a teen until I was in my mid 20s. :D For me, it's down to clothes, hair, makeup to make them stand out from adults and look more like teens.