The Best Mattresses for Kids Finding the best mattress for a kid can be a challenging task. While most adults have spent years learning which type of mattress and firmness feels best for their sleep style, kids will be building good sleep habits on the mattress you choose, so an uncomfortable or unsupportive mattress can more easily disrupt their sleep or train them be permanent stomach sleepers, which is not ideal for long-term wellness. The right mattress can help a child develop healthy sleep habits; after all, children spend much more time sleeping than adults. Buying a mattress for kids can often feel like a guessing game, since cost and size can be a factor. San Antonio, Texas-based Mattress Firm Sleep Expert™ Sarah Martinez has some insightful tips of what to keep in mind when shopping for a kids mattress that will leave them sleeping comfortably during a time when restorative rest is important for growth.