What will a mattress for kids provide that a baby crib mattress won't?
Generally, a mattress for kids will provide more length softness than a crib/toddler mattress will. Infants/toddlers need firmer mattresses that will fit the crib for safety when sleeping, whereas slightly older children (ages 2-5) who can likely get themselves in and out of bed regularly are okay with a softer kids mattress.