In children, the center of mass is generally located higher in the body compared to adults. This is due to the differences in body proportions between children and adults
Children have a proportionally larger head compared to the rest of their body. Their lower limbs are relatively shorter.Their trunk is proportionally longer.
These differences in body proportions are due to the process of growth and development. As the child grows, their body proportions change, which leads to a gradual shift of the center of mass downwards.
This process continues until adulthood, where the center of mass generally stabilizes in a lower position compared to that of a child. This difference in the position of the center of mass has implications for the biomechanics of movement and balance, which partly explains why children may have different movement patterns than adults in certain physical activities.
Hence, the benefit of a lower bottom bracket ...and a dropper post.