So I need a bit more help...

I'm not sure if it was just an off day (one of the kids was sent home after his told told me he had pinworms and I'd cleaned most of the morning while they had free-play/TV, no outside time), but my 3 year old boys were terrors at nap, ended up waking the babies up after an hour and I couldn't get them back down.

Last week I stayed upstairs (where the bedrooms are) with the video monitor and kept an eye on them that way. I can talk through that do I did so when I needed to. Yesterday the boys were getting out of their beds, making loud noises, banging on the walls, and talking/playing with each other. I started talking through the monitor again, moved right outside their door and opened it to talk to them, and ended up in their room at one point, it was when I left that they woke up the little ones and everything fell apart. They seemed to think of it as a game so I'm trying to nip it in the bud - any suggestions?

Just to note, they didn't escape quiet time after this. Though I did separate them and we talked about it later. One of the kids cried all afternoon so I was able to use it to tell them that the baby is sad and upset because he was woken up from nap and he's tired. We'll see how it goes today...