You would need to create a query to include in the recall section.
Log into the recall section as per the PDF guide.
1) Tick box that states "Include Query"
2) Press the 3 dots, new query
3) Select "specify attributes"
4) On the left hand side double click "Date of Birth"
5) Change operator field from "Is equal to" to "Is later than or equal to"
6) In the value select the 3 dots, and change to option 2 "Releative to current time"
7) Press up on years to 18 (or whichever the oldest age you want)
8*) Press OK and Finished, save with "Children Patients" as the name
This will then include this query into the search providing the "Include Query" box is ticked.
Use the months at the top right to filter through which month recalls you are working on.