Photoshop?
If they are competent in that when they are that age, they are doing very well.
In my experience most people use filters on their phones to tweak photos, if they are going to doctor them. I don't bother (I'm beyond help
), but it only takes one click of an app that is free on pretty much any phone.
Photoshop is expensive and involves a fair bit of specialist knowledge to use effectively. I would be encouraging them, personally.
Women are a minority view so should be disregarded


). It might be fun for you, but they might also see how silly it is, (or not). Basically "if you can't beat them, join them".