The Modway Aveline Gel Infused Memory Foam Twin Mattress is the most suitable twin mattress for toddlers, in our opinion. Apart from its affordability, which will surely attract a lot of parents, it also has a minimal amount of motion transfer, making it comfortable for two toddlers. Apart from that, it also offers universal support since it strikes a perfect balance between being soft and being hard, which is ideal for all sleepers.