According to French neurobiologist Jean-Pierre Changet, one of the main features of human brain development is that it continues long after birth... about fifteen years. And during this time you have to learn a lot and prepare your brain for adult life.
The adult brain loses plasticity, but the child's brain is very flexible. During learning, the brain builds new connections between neurons, but it is most susceptible to change at an early age. Interestingly, a child's brain forms twice as many synapses (connections) as necessary. Over time, unnecessary connections will break down. To leave more connections, you need to load the brain with different tasks: dancing, math, music, reading, learning languages, creativity, and so on.
Adults have a harder time absorbing information, while children, on the contrary, are more active in learning new things. From 4 to 10 years of age, children's brains are twice as active as adults' brains. Thus, a child's brain uses up to 50% of oxygen, while an adult's brain uses about 20%. Between the ages of 7 and 11, learning is the leading activity in children. It's as if the brain itself is asking "teach me, I'm ready, I want to."
Adults don't have time to study, but children do. Children absorb information while playing, and they have about 15 years to do so. They don't have to work, build a family, take care of housing, and so on. Childhood is the best time to lay the foundation for a successful life later in life. And it is important to teach children that self-education should be an integral part of life. If the brain is accustomed to strain from childhood, it will remain alive and flexible even at 70.
Learning from an early age pays off. For example, Anatoly Wasserman was tutored by his mother since childhood. At the age of 4 he could read, at the age of 14 he himself read a 15-volume reference book on mechanical engineering and tried to explain this information to his younger brother.
Sergei Mikhalkov was homeschooled, entered school as soon as he was in 4th grade, and wrote his first poem at the age of 9. And this just confirms the idea that children's brains have incredible potential. And it's up to you to decide how to use it.