When buying a mattress for a platform bed, the different needs of each user should be considered as much as possible. In general, the length of the platform bed mattress is best to be at least 15 cm longer than the height of the sleeper so that you can comfortably turn up on the bed, the stiffness of the mattress must be based on the actual physical condition of each person. . Specifically: a children's mattress is a little harder and more suitable, it should not be too soft to affect the normal development of the child's spine. You can use a small steel wire bed to avoid mattress deformation. Find out more about 10 things to consider before buying a mattress here: https://platformbedexpert.com/10-important-things-to-consider-when-buying-a-mattress-for-platform-bed/