One of the most fundamental questions for kids is: "how were they made?"
It all begins in the mother's womb... well, not quite ... The egg in the mother's tummy is there because two reproductive cells, a sperm and an egg, have fused. This is called fertilization.
Then, the egg grows and becomes an embryo, then a fetus. Next, organs and limbs develop, as the fetus gets ready to take the plunge! And then what happens when Mom goes to the maternity ward?