I feel for you as I was the same when I first started out with my first daycare kid...rocking her to sleep...trying all sorts of things to get her to sleep. However, I learned fast that unfortunately, the only way to get peaceful days and quiet naptimes is to let them cry it out right from the beginning. I go back and lay them down every 5 minutes or so until they stop crying and go to sleep...even if it takes the entire naptime. Within a week or two, they understand there is no getting out of it and they start sleeping on their own. You NEED naptime to reboot your energy, clean up etc. You will brun out if you continue like that. I have many kids who don't sleep at naptime for their parents, but they sleep very well here...consistency and routine is key. I wouldn't be asking the parents anything...what they so and what you do is not the same. They don't get to tell you how to do it at your house. It is so different when you have multiple children to care for. Good luck to you!