I am trying to create a booking form (as a tester in the free version) and would like people to be able to add their names and age if they are under 18 without having to create a seperate box for each name which may or may not be filled in (the main booking may be in the mother's name but I need to be able to collect the names of the rest of the family). Hope this makes sense.
There isn't anything that would save you from having to create each field (copy paste helps of course) but from the users perspective you don't need to have all of those fields shown if not needed. One feature in a paid account is skip logic, you could have a checkbox to "Add another person" and when that box was checked another set of name/age fields would appear.
Here is some information on Skip Logic: https://www.acrobat.com/formscentral/en/library/skip.html
Thanks for the info, very useful.