I used to play purchased audio stories once in a while for my grade two students as a treat (or if I was having a bad day
). That paved the way for me to do recordings of their reading - they were SO excited about it!
At that point they were writing their own books, so I recorded them reading them aloud. They then took the book and recordings home to play for their family or mail to grandma, etc. It was a really good eye-opener for them (and their parents) about their volume, expression, enunciation, etc. And, they had no idea that the goal of it was not just for them to have a little keepsake for the year, but for their own self-evaluation.
Your kids might get a kick out of listening to themselves read a book. Or, they might just run away and say NO! Depending on the attitude of the day!