How many kids do you have? I also have a home daycare and have many that nap as well. Some days I will put as many as 3 in 1 room. 1 in a playpen, 1 in a bed and 1 on a crib mattress on the floor (I have some kids parttime, so not all the same kids are here every day). I have a room darkening shade and a fan on, I just dont put them all down at the same time. At least 1 is asleep and because the room is so dark, they really dont see each other, so it isnt a problem. My husband works shift work and sometimes is still sleeping when nap time starts so I have to put more than 1 in a room, or I want 1-2 bedrooms empty so I can fold laundry or clean while they nap. I also use this time for quiet time for the 3 and 4 year olds so they do puzzles, look at books or watch tv/movies. I also need to have some quiet time as you likely do as well. Does the 3.5 year old need to nap? Have you talked with her parents about napping? She may nap or be quieter if she is in a darkened room by herself, or at least be quiet for 30 minutes, then her reward could be a movie or something that she would find special without the younger ones. Even a special treat might work, something that younger kids cant have such a sucker.