I have a range of pick up and drop off times too and it is pretty consistent so the kids even know who usually comes and goes first. In the morning tv is available for the first couple kids since there is 45 minute window (6:30-7:15) but then as we go to answer the door I turn the TV off and they have freeplay till all arrive. I plan my program to run from 9-3:30 which is roughly the same as the school day. The time before and after that when all the comings and goings happens is freeplay within the limits I have set out - mostly blocks, fisherprice type stuff, cars, books, nothing messy. In summer we are outside at pickup.