The first-ever educational and interactive height chart. Record your children’s height while comparing them with the real average height of an animal. * F.A.Q. Why are there some inches/centimeters without an animal’s name? The product does not want to present false information about the animal’s average heights. Therefore, if no animals were found for that specific height, it was left blank. However, there will always be an animal in close proximity that you can compare it with.