PERFECT "surprise" modulation for primary song

I found the PERFECT modulation for a great primary song. It's a rare, yet satisfying "direct" pivot-chord modulation. I found it as I've been hunting for pieces to use as models for my new opera, "A Christmas Carol." And it would work SO well as a transition from the verse to the chorus of a primary song. That transition is really important because you don't want the kids to feel like the song is OVER at the end of the verse. You want the verse to tip into the chorus with a sense of...