When the cat ran into a certain room for the first time, she went from here to there, sniffing and checking everything, and couldn't be quiet for a moment.She'll doubt everything until she's checked and knows what it is.The same is true when a toddler first enters the world that surrounds him and then begins to speak.The only difference is that while vision is also used, the child uses his hands in addition, while the cat uses the keen sense of smell endowed by nature.This is instinct.And right or wrong education will make a child dexterous or clumsy, quick or slow, wise or stupid.