Well, Makenzie is very funny as usual and this day she was reading her "Bible" book and Kaiden wanted to read it too...as she was singing, she very nicely redirected him towards getting his own book. He wasn't really happy that she wouldn't give up "her" book, as you can see he gets a little upset, but they are still very funny together. It seems more recent than ever that she is constantly singing when they are playing together, or when she is doing anything. She must have gotten that from her Papaw.