Daycare mom....I have to say that even tho this child cried 24/7 for 2 weeks, when it came to his arm, he was a trooper! It was in a cast and then his parents put it in a sling as well for the first couple weeks. He didn't show any signs of discomfort but I'm sure some of the crying was due to pain. I'm not sure if they gave him anything for pain but I know I didn't. He was just over a year old. He eventually didn't wear the sling and when he played you wouldn't even known he had a cast on. I told the kids xxx had a boo boo and that we couldn't touch his arm. They were all fantastic and never bothered him.
For nap, he still slept on his stomach with his bum in the air. His arm never seemed to bother him!! We even went outside and he would play a bit.