The html code can not read the min/max ages on the class page, therefore, to make tables by Age groups, set up Cat3 as your various age groups and then filter by Cat3. For example, create Cat3s such as Infant, Toddler, PreSchool, Elem, Middle, High, etc based on ages, and assign each class the correct Cat3. Then filter for &Cat3=Toddler to create a table showing only those classes.