Sony Minidiscs works great with little kids as well, especially when used with a non portable "Salon" player which you slot the minidisc on. They are large enou

Sony Minidiscs works great with little kids as well, especially when used with a non portable "Salon" player which you slot the minidisc on. They are large enough that you can print stickers on them for easy recognition and the media has an arrow drawing that tells people in which direction to slot it in. Any kid learns quite quickly how to use the triangle play button and the square stop one.