i went through hell with a non napper but it was full time. i perservered and things are much better now. the odd day here or there that doesnt go well but i would never had waited so long if she wasnt full time. you need the consistency of full time to settle a little one with napping issues. personally i dont think that 3 days will make any difference at all. I no longer take kids part time because you never know how they are coddled or catered to the other days by mom or gramma.