The single most important thing needed for brain development is sleep.
Sleep is the most important activity for kids and babies. A wide range of studies has been done on the link between sleep and brain development. They conclude as adequate sleep is critical. Sleep looks like a simple and silent thing. But a lot of things happens when kids sleep.
Research shows that, while sleeping, several new neuron links happen in the brain. If develops in a rapid manner. More than 85% of thoughts processed by the subconscious mind. This activity happens more in babies than kids. But still, kids also show great progress in brain development till teenage.
So, we can conclude that brain development happens more when kids sleep. It is as important as having meals every day. Take care.