Yes, you can flip the Saatva Youth mattress, which is why we think it's such a great choice for kids—it's designed to grow with your child. One side is made for kids ages 3-7, while the other side is designed for children 8-12. Those ranges can be tweaked slightly based on your child's weight or size (smaller kids for their age might prefer the softer side made for younger kids while bigger kids for their age might prefer the firmer side). For example, if your child is 7 but is big for their age, you could go ahead and flip the mattress to the firmer side rather than wait until they turn 8.