The brain develops rapidly during children‘s early years …

„Recent research in neuroscience and brain development shows that the brain develops rapidly during children‘s early years. As they grow, these learning capacities slow down and the amount of effort it takes to learn new skills increases. High brain malleability early in life means that young children are especially sensitive to external stimuli, such as the types of interactions they have with their parents and other caregivers.“
Rowena Phair, MA, International Early Learning and Child Well-being Study. Assessment Framework (2021), S. 21.