We just learned about the ridges on the roof of the mouth called the Palatal Rugae.
Another part of the inside of the mouth is the Incisive Papilla.
Right behind the top two front teeth called incisors is a little bump of skin that sticks down.
A bump in mouth medical words is usually called a "papilla" and its right behind the incisors so it's called the incisive papilla.
It's usually right in the middle, and you can feel it with your tongue right behind the teeth.
(from: wikipedia - incisor)
Kid Facts - Blast from the past: Teeth
