Anatomy of a Cell

I was quizzing my eldest on her biology...she is seven, and studying cells. I had several different pictures of cells in my hand and was asking her to identify parts of the cell. I flipped through the cell pictures, and murmured to myself, "I don't see flagellum on this cell." She grabbed the pictures out of my hand and handed me a cell picture, and said, "That is because the flagellum is only on the Prokaryotic Cell mom." Hmmm. I think I need to take a biology class again.