Young kids are always singing and painting. When you get to that second and third grade level, you're supposed to put all that aside.
Even if nobody's singing, just when you talk, you're singing. I'll meet somebody and say, "Oh, I'm tone-deaf." I say, "You're not tone-deaf, because if you were tone-deaf you would speak like that. But you're 'Oh, I'm tone-deaf.' You already sang a song to me."