Is there a different rate for the Hong Kong Airport Express travel pass for children?

The cost of the airport express travel pass is as the following:
HK$220 – Pre-programmed with 1 single Airport Express journey and 3 days of unlimited travel on MTR, Light Rail and MTR Bus (except Airport Express, East Rail Line First Class, Lo Wu and Lok Ma Chau stations).

HK$300 – Pre-programmed with 2 single Airport Express journeys and 3 days of unlimited travel on MTR, Light Rail and MTR Bus (except Airport Express, East Rail Line First Class, Lo Wu and Lok Ma Chau stations).

Children under 3 travel free
Children aged 3-11 travel for just 50% of the adult fare.