My chidlren do a large portion of their school work on the computer.
my 11 year old easily spends 2-3 hours a day.
my 7 year old spends about 1-1 1/2
my 4 year old spends about 15-45 minutes
they do phonics, math, science and social studies, greek, music theory and they each get 15 minutes of play time. my oldest one also has a writing program that came with her camera and sometimes they will all sit around taking stupid pictures and making up a story.