I have an issue with the boy that arrives later than the others. When we go for nap he usually isn't ready to sleep yet as he gets hear almost 2 hours after the rest (so gets to sleep in longer in the morning at home). It drives me crazy. I have had to put him in the corner and I drape a blanket over the 2 sides of the playpen that he can see out of. I keep wanting to sew some covers for the 2 sides and Velcro them on I just haven't gotten around to it yet. Maybe try that. I know as soon as he can't see the other kids and communicate with them he goes to sleep.