It's no surprise that my little girls are interested in make-up. It's no surprise that when they are watching me put it on that they want some, too. It's no surprise that they get into it if I leave it within their reach.
What is a surprise (to me, anyway) is that from an extremely young age they know exactly what to do with each type of make-up. If Sophie finds a tube of lipstick or some of the girls' lip gloss lying around, she knows to put it on her lips. When she gets into my stuff and finds a blush brush, she brushes it across her cheeks. She puts eye shadow on her eyes with the applicator.
And she also knows that mascara goes on her eyelashes.
She just needs to hone her skill a bit, that's all.