5 Days in HK

Hi there.
My family will be going to HK this February, 5 adults and 2 kids ages 5 and 2. So regarding the Airport Express Travel Pass:
1. Can we still avail of the free AE shuttle busses to and from AE stations and hotels on the AE list?
2. Will my godson aged 2 ride for free on AE train?
3. Is the AE travel pass advisable if our itinerary in HK will consist of hotel accommodations either HK island or Kowloon, Ocean Park, Shopping areas and Disneyland?

Thank you so much!