Displaying separate pricing for children and adults

Hi there,
We are trying to add Child Prices (Quantities) on the cart page along with the adults on the cart page, but for some reason it’s not working for us.

We have enabled the Option “Separate pricing for children along with adults”, but still can only see adult quantity in the cart page under the traveler’s column. What else do we have to do to see an option for the Children on there as well?

Thanks,