Booking through Discovery Vitality Kulula flights for kids

<p><br />You can book for a flight through Discovery Vitality on Kulula for a child if the child travels with an adult. My parents have booked to travel through Discovery Vitality on Kulula, but I can' book a single ticket for my child to fly through Discovery Vitality on Kulula to travel with them on the same flight. I have to book an adult ticket not using Vitality discount and then Kulula can link it to my parent's booking reference. It is astonishing that a very innovative company like Discovery have not thought of giving their clients an option to insert the reference from another adult the child will be travelling with in the booking through Discovery. Surely this is an easy development for a company like Discovery to develop? Or do I have a misconception of Discovery?</p> <p> </p>