What is every color, is on you, in you, and all around you, is both very large and very small, can be eaten, and can eat you?
Look around you. What do you see? A classmate, a brother or sister? Look out the window, or go for a walk. You will see trees, grass, plants, dogs, cats, bugs, and many other forms of life.
Now, think about this. Life extends much further than what you can see. Everywhere around you, all over your keyboard, the computer monitor, your desk, the walls, the floor, the ceiling, your clothes, and even your skin, you can find billions and billions of tiny microscopic lifeforms.