Why do we get older?

We get older because our bodies keep changing. You grow taller. Your hair and nails grow. You learn new things each day.

We get older because time keeps moving, and our bodies keep changing. Food and sleep help you grow and fix little hurts. When you are small, this makes you taller and stronger. Later, the fixing gets slower. It is like a favorite toy that looks different after many days of play.

We get older because our bodies are alive and always changing. Your body is made of tiny living building blocks called cells. Cells grow, make new cells, and fix damage. Over many years, those fixes get slower, and little wear builds up. That is why kids grow taller, and older people may get gray hair or wrinkles. Fun fact: every minute, your body makes millions of new cells.