Hi @Adrian80 I'm not sure if Airbnb has plans to build an additional box with an added fee for children into their format in the future, but for now, all you can do is list the one additional fee in your pricing settings. If you'd like to charge less for children, you'll have to note that in your listing description somewhere and then collect the additional charge through a special offer or the Resolution Centre.
We decided to just charge the same for each additional guest regardless of age to simplify things & haven't had any negative reaction to that so far. Airbnb has a policy that children under 2 are free, so there is no charge for them but we like to be made aware of them at time of booking. Hope that helps! Karen
