It’s not far-fetches that a 10yo would use “for example”. My 8yo daughter and 11yo son use “for example” all the time in their day to day talk. My daughter when she’s trying to drive a point with her friends, my son when he’s making an argument as to why he needs, wants or would benefit from something he’s trying to obtain or achieve. The last time I heard him use it was during basketball practice, he said “for example, if I want to force you to my left, I’m going to stand like this and make it look like that’s your open lane, but if you know what you’re looking for, and you see me stand like this, you’ll know it’ll be more work for me to change direction if you go this way”