Depends on the child and not what other people say.
My three are busy - sometimes I think they're too busy:
DD (15)
Monday, Spanish, paper-round, cello
Tuesday, paper-round, dance
Wednesday, paper-round, dance x2
Thursday, twilight school course, paper-round, Guides
Friday, paper-round
Saturday, dance
Sunday, rowing, youth club
DS (13)
Monday, paper-round
Tuesday, paper-round, Spanish
Wednesday, paper-round, school sport, football
Thursday, paper-round, school sport, football, scouts
Friday, paper-round
Saturday, paper-round x 2, rowing, guitar
Sunday, paper-round, football
DS(11)
Monday, band, football
Tuesday, table-tennis
Wednesday, youth club
Thursday, rugby
Friday, judo
Saturday, football
Sunday, korfball
Not sure how we got here, and it's not necessarily let off the older they've got. They are coping with school work, and they do have time to hang out with friends. These two last points are the most important things.