Originally Posted by mommyneedsadayoff:
"Yes, you can absolutely drop in to pick up your child anytime! I appreciate a heads up during nap hours, as it allows me to make the pick up as least disturbing to the others as possible, but you may drop in to pick up your child at anytime during the day."
Just to add, I did the one pick up/drop off policy for this reason. Other than parental piece of mind, it is usually disruptive to have them drop in, so in exchange for that disruption, I get one less kid to deal with. 
I love this! How do you word this in your handbook, if you don't mind me asking? Or what would be a good example of how to phrase it for use in a handbook?