Your baby's brain explained | 'Three times more active than an adult's' brain: The preschool years

If you've ever wondered what's with your preschooler's never-ending need to know why or desire to explore everything, you can blame it on their brain. 

Preschoolers are the very definition of dynamite in small packages with their brains that are  nearly "three times more active than an adult's" brains.

So says cognitive development and early learning expert Dr Caylee Cook.