OS? Win or Mac FMP version?
The child data would be viewed by children via FMP client or Web browser or FMGo?
Or are you the only user and you want to view data by age?
Oh of course -
Mac OS 10
FMP 12 Advanced
Web and FMGo
I am the only user right now
Scripts can use the value of the age field and go to layout to go to different layouts based on the value of the field.
If [YourTable::age = "Child" ]
Go to Layout [ "ChildDetails" (YourTable) ]
Go to Layout [ "AdultDetails" (YourTable) ]
Thus, you can click one button to go to a "Details" layout, but value in Age of your current record will determine which layout appears.
But I'm making a lot of guesses about your database design that may not be correct.