Children’s big teeth generally refer to children’s molars, for the molars of the milk teeth, usually start to erupt at about one and a half years old, generally erupted is the milk 1st molar, that is, milk 4, and then start to erupt milk 3 and milk 5, in short, the molars of the milk teeth are started to erupt at about one and a half years old, eruption is completed before 3 years old. As for the permanent molars, the first one is relatively early, erupting at the age of 6 years old, that is, the sixth molar, professionally known as the first molar, and the remaining two molars erupt later, the second molar usually starts to erupt at the age of 12-14 years old, which is also at the very back of the tooth row. The last erupting wisdom tooth, also known as the third molar, begins to erupt around the age of 18-25.