We've been working on it for a long time: my 3rd graders and a little 7-minute musical I put together, using some songs from a curriculum book and my own amended script for the talking parts.
We tried during summer session, but the motivation at that time was low. Then we started again last month, and this time the motivation was high, because we were slated to perform in the school arts festival (학예회). That was today, and we did it. Not perfect, due to poor sound system, among other things. But it was successful as far as the audience (parents and kids, mostly) was concerned. And they were very cute doing it. Here's a video – poor quality, I admit. I didn't take it – I had to hand it off to one of the staffroom ladies, because I had to supervise the sound guy to make sure he started the songs at the right time based on the kids' dialogue.
I'm very proud of them. I'll make another video sometime soon with some other random footage from festival and from our practice times leading up to it.