ELI5: Explain Like I'm 5

natural number

A natural number is a whole number, meaning it doesn't have any pieces taken away or added. The numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and so on are all examples of natural numbers. Natural numbers can be used to count things, like the number of apples in a basket or the number of people in your family.