I do have a 4 day rate and I would be charging it because the child is utilizing the space 4 times. My 4 day rate is more than 4 times my daily rate. In a lot of cases the parent ends up just booking the full time space so they can have the option of the fifth day. Because the child is only using part of two of the days I would probably come up with a 4 day rate. You can set the amount based on the hours of care for the part time. If they come for the morning and do snack, crafts and lunch the price would be differnt than if it was after lunch and they just did nap and snack.