If we sing a note, Nate will match our pitch. His pitch is actually really good. I think it's funny & probably normal for a child to imitate in that way, but I think DH is looking for it to mean something more.
Don't you just love how whatever a baby does, it somehow means that they are a genius at that thing? Like Nate throws a ball really well, so he's going to be a pitcher! And now he's matching our pitch when we sing, so he's obviously a musical genius! Personally, I think he's just a goofy toddler.