Facts about teeth are always interesting for kids. They finally had their set of teeth and need to learn more about these beautiful white cutters in their mouths! Teeth are just like bones. They are alive and have nerves. teeth start forming before one’s birth and just continue to develop until adulthood. Teeth are located inside the jaw and are protected by the gums which are surrounding them. the part of the tooth which is above the gums is called the crown, and the part which is unseen in the gums is called the root.