Amazon recently updated the children's profiles extensively and also adapted the hardware for children of elementary school age with the Fire Kids Pro. In addition, even the youngest children can now use Alexa for communication. Beyond the entertainment, however, weaknesses are revealed.
https://www.notebookcheck.net/Amazon-Fire-HD-10-Kids-Pro-2021-Review-Sophisticated-children-s-tablet-with-limitations.547320.0.html