Who is smart?

“Don’t play with the toy so harshly. It will break.” A mother instructed her kid. “It is a baby’s toy.”

“Baby’s toy??? I can’t see any baby in this house.” They were the guest. To confirm the kid went in all the rooms to check if there is any baby. “THERE IS NO BABY IN THIS HOUSE.” He said confidently.

“hmmm……..The baby has gone to the market with her mother. Her mother has to do some shopping.” The mother told a good reason to convince him.

“You have thought a lot before speaking that’s why you are telling a lie.”

Who is smart; mother or the kid?