Hello! Glad to help.
The answer to your question would be true. Th more a toddler or child is social with others it increases the size of the childs brain and memory becomes better. When a toddler or child has a learning experience the toddler or childs brain becomes bigger and smarter. For examplin if a toodler or child touches a hot stove then they learn not to touch a stove because it was hot.
Hope this helped! Anymore questions? Just ask.