US customs - with children

Hi,
Flying into LAX next week with my wife and 2 boys, aged 8 and 11 for the first time, and I have a couple of questions relting to the entry procedure
Will we be questioned as a family as to our reason for wanting to enter?
Will the childern have to provided finger/eye scans?
Do we need to print out our ESTA forms and provide them?
Many thanks
Flying into LAX next week with my wife and 2 boys, aged 8 and 11 for the first time, and I have a couple of questions relting to the entry procedure

Will we be questioned as a family as to our reason for wanting to enter?
Will the childern have to provided finger/eye scans?
Do we need to print out our ESTA forms and provide them?
Many thanks