Hi Bullsusf00,
You may have read this since it’s linked in my first reply in this topic but just in case you haven’t (there is a lot of information in the topic) post #2 here and the topics it links to have more information about mattresses and children and “safe” materials including a link to some general guidelines for children in post #2 here. It also includes links to the better forum posts and topics about mattress and children which also have more information about many good options for children as well.
Phoenix