Hi tl11,
No it would be fine but I would still choose a firmer latex mattress with children than for an adult because their growing but less developed bodies need less contouring and firmer support. Post #2 here has links to the better threads in the forum about mattresses and children that will be helpful and also have some good sources for children’s mattresses. I just added this thread from yesterday to the children’s mattresses post who were also looking for a crib mattress and may also be helpful.
Phoenix