Visual Matrix does not currently support setting rates based on the number of children in a reservation. Rates can only be configured per adult.
The “Kids” field on the reservation screen is for informational purposes only and does not affect pricing. Adding a number in this field will not trigger any extra person charges.
If you would like to charge a fee for each additional child in the room, you can use the Add-On feature to apply a fixed amount per child. This allows you to manually control how much is charged for kids staying in the room.