Why would it surprise anyone that they're 25 years old now? People add one year to their age every birthday. It doesn't change the fact that they might have been brought here at two years old, 23 years ago, and actually have no operating memory of ever being in another country. To them, this is their country and they're contributing positively to it every day, more than many citizens are. They might not even speak the language of the country in which they were born. Of course they were "little kids" even if they're not now. It is nonsense to send them back to where they've never been in their operational memories.