I am relatively new to CM and was just going to do wraparound care.
However, I was approached by a family who have a 2 year old and a 4 year old so I am looking after the 2 year old in the day and providing wraparound care for the 4 year old. Sometimes you just can't say no.
I have just signed the paper work today and on a Monday and Tuesdays I will have mindees of the following ages: 2, 4, 5, 5 (both y1), 8 and 9 plus my two 6 & 3.
On Wednesdays I have a mindees aged: 2, 5, 5, 8, 9 & 10 plus my own.
But on Thursdays & Fridays I am free in the day for Gym in am and time in pm for my own DS after nursery. 
And some Thursdays due to the shift pattern of 1 of my parents I will be off and may just have 1 on a Friday - yay.
I know I'll be very busy but I find the after school sessions just fly by and the kids enjoy playing together. Also all my parents don't mind a bit of CBBC being watched because they've all had busy days at school.
I find that by the time tea is eaten the parents are arriving to collect. I provide a light tea, as the children tend to be hungry straight away and rather than provide a snack and later a dinner I just do sandwiches, wraps toast etc. also it is easier to vary sandwich fillings than whole meals to account for tastes.