Though Groups are great for organizing your members into groups or classes, there are many situations in which you simply want to group your members by age. For that, we use Age Categories.
In the Setup tab, select "Age Categories." Then, select "Add List Option" to customize and add new categories.

Additionally, you can select one of the example individuals in the People screen, then select the "Edit" button above their profile. Scroll until you find the "Age Category" field, then select the "Edit List" button as shown:

Make any changes to the age groups to reflect how your ministry divides members by age.
Though you may already be selecting an individual's Age Category when they're added, they will eventually move to another as they grow older.
Select the "Auto-Assign Age Categories Based on Current Age" button to sort everyone in your church database to their proper category. This is done manually and does not automatically move a person on their birthday during the year.
We recommend auto-assigning age categories at least once a year. Most churches do it at the beginning of the school year so they can organize their classes accordingly.