The only blocking point would be fit. The Dreem 3 headband is designed to fit head perimeters between 520-620mm (20,47"-24,41"). To ensure good signal quality, the headband must be properly adjusted, the tighter it is, the better the signal quality. For pediatric studies, it is therefore not the age of the child which needs to be taken into account but rather head size. While the headband can fit adolescents well, it may vary from one child to another in younger populations (under 11s).