He sleeps soundly, has a good childish appetite, and appears to be in perfect health.

His motions are quick but not nervous, and are as well coordinated as in a child of ten.

In fact, he impresses one as having the intelligence of a much older child than three years (now five years), but his height, dentition, and general appearance indicate the truthfulness of the age assigned.

An evidence of his symmetrical mental development appears in his extreme inquisitiveness.

He wants to understand the meaning of what he is taught, and some kind of an explanation must be given him for what he learns.