Skincare for a teenager with oily skin and spots- but that are "fun"

OK so cutting a long story short; I've got a neice who is nearly 13, in fact so near that it's her birthday this weekend. It's a sensitive area but I want to help her out with her skin.

What I have noticed- and I feel bad about saying this, is that her skin is not looking great....I can see she has a lot of spots and I wanted to try to help with that. I've a feeling that skincare isn't something she does. It's a sensitive area. I do not want to offend her or make her think it's a problem which is so obvious that she ends up with issues. But I know she hasn't fully hit puberty yet and can only see this becoming more of a problem for her knowing how much it affected friends I had growing up.

Now I have to be honest here- I don't know a lot about having huge issues with spots to the degree she has them. I also don't know anything about oily skin types (mine is super dry and very sensitive/fussy and though I have big issues and skin problems, we don't share them and I know her mum has my skin type too).
I don't think she has properly medical acne or requires a Doctors help, I get the feeling it's down to having oily skin-type and maybe using her mums products (for dry sensitive adult skin) if she uses any at all. I think (or know from speaking to her) that a cleanser isn't something she buys so imagine the spots are from not keeping her skin clean or cleaning properly.

I have thought about getting her some products which are fun but will just keep her face clean- but wont be gimmicks that wear off after a week. I know she loved the Konak sponge I bought her mum a year ago, I want to get her more than a sponge though and I want to get her something that helps her out here.

I recon I can get around the offence thing by buying something that is interesting and fun rather than serious I think I can sneak through the sensitivity thing, but what I need is something that works. I know she likes Lush if this is any help.