Never! Education is the most paramount activity in a child's life. To pull a child out of school for fun activities is asinine at its worst and a form of child abuse at its best. Children need to be in school for as long and as much as possible.
Any activity to me which is not constructively educational is a total waste of time and a total nonissue. Fun activities? What fun activities, these activities are stupid and a total waste of time. Children need to bury their heads in their books. Fun activities are not going to help a child get anywhere careerwise. Children must be taught the education ethic. There is too much emphasis placed on social activities and not enough on education!
My father raised me to eat, sleep, and breathe education. He would frown upon such a premise. He always stated to me that social life is often superfluous at best and that time should be spent educating oneself! He further added that the most important thing in life is achievement, achievement, achievement!