Shampoo is the thing you use to wash your hair. When you play outside or do activities, things like dirt, sweat, and oil can build up on your hair and scalp. Shampoo helps to clean that all out and make your hair feel fresh and clean.
Shampoo can come in lots of different colors and smells, and some shampoos are better for different types of hair. For example, if you have curly hair, you might want to use a different shampoo than someone with straight hair.
To use shampoo, you wet your hair in the shower or bathtub and put a little bit of shampoo in your hand. Then you rub it into your hair, making sure to get all the way down to your scalp. Rinse it out with water and your hair should feel squeaky clean!