Should we teach her lessons now?

My wife asked me if i wanted Abby to be put in pre-primary classes to give her a start in her education. i told her firmly that at her age now, she should be enjoying her childhood and not go through studies and lessons. She will have at least 30 years of her life studing and preparing for exams, why took away her precious 5 years of he childhood. i don't even want her to play with computers now, i want her to play, enjoy music and her brother's companion.