Quinn is learning a song and "dance" for a performance in April.
Last night she was trying to teach it to Brock with great success.
She was giving me instructions about when to start / stop the video.
And every couple of measures, she would show Brock the corresponding arm gestures.
Then she tell me to play the song from the beginning and they'd go through each part to that point.
It was awesome.
The only blind spot, was that Quinn was not able to recognize when Brock was done with the task and ready to move on. But hey, sometimes we parents even have a hard time with that.
Here is the reference video and song.